okay i have everything working for the gui block working and i can use the slandered minecraft furnace gui png, but i want to over lay my own gui png. here is the files

 

TileEntityGrinder.class

 

package com.DefineCraft.Blocks.Grinder;

import javax.annotation.Nullable;

import com.DefineCraft.Core.DefineCraftModItems;

import net.minecraft.block.Block;
import net.minecraft.block.material.Material;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.init.Items;
import net.minecraft.inventory.Container;
import net.minecraft.inventory.IInventory;
import net.minecraft.inventory.ISidedInventory;
import net.minecraft.inventory.ItemStackHelper;
import net.minecraft.item.Item;
import net.minecraft.item.ItemBlock;
import net.minecraft.item.ItemHoe;
import net.minecraft.item.ItemStack;
import net.minecraft.item.ItemSword;
import net.minecraft.item.ItemTool;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.tileentity.TileEntityLockable;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.ITickable;
import net.minecraft.util.math.MathHelper;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

public class TileEntityGrinder extends TileEntityLockable implements ITickable, ISidedInventory
{
    private static final int[] SLOTS_TOP = new int[] {2, 1};
    private static final int[] SLOTS_BOTTOM = new int[] {0};
    private static final int[] SLOTS_SIDES = new int[] {1};
    /** The ItemStacks that hold the items currently being used in the furnace */
    private ItemStack[] furnaceItemStacks = new ItemStack[3];
    /** The number of ticks that the furnace will keep burning */
    private int furnaceBurnTime;
    /** The number of ticks that a fresh copy of the currently-burning item would keep the furnace burning for */
    private int currentItemBurnTime;
    private int cookTime;
    private int totalCookTime;
    private String furnaceCustomName;

    /**
     * Returns the number of slots in the inventory.
     */
    public int getSizeInventory()
    {
        return this.furnaceItemStacks.length;
    }

    /**
     * Returns the stack in the given slot.
     */
    @Nullable
    public ItemStack getStackInSlot(int index)
    {
        return this.furnaceItemStacks[index];
    }

    /**
     * Removes up to a specified number of items from an inventory slot and returns them in a new stack.
     */
    @Nullable
    public ItemStack decrStackSize(int index, int count)
    {
        return ItemStackHelper.getAndSplit(this.furnaceItemStacks, index, count);
    }

    /**
     * Removes a stack from the given slot and returns it.
     */
    @Nullable
    public ItemStack removeStackFromSlot(int index)
    {
        return ItemStackHelper.getAndRemove(this.furnaceItemStacks, index);
    }

    /**
     * Sets the given item stack to the specified slot in the inventory (can be crafting or armor sections).
     */
    public void setInventorySlotContents(int index, @Nullable ItemStack stack)
    {
        boolean flag = stack != null && stack.isItemEqual(this.furnaceItemStacks[index]) && ItemStack.areItemStackTagsEqual(stack, this.furnaceItemStacks[index]);
        this.furnaceItemStacks[index] = stack;

        if (stack != null && stack.stackSize > this.getInventoryStackLimit())
        {
            stack.stackSize = this.getInventoryStackLimit();
        }

        if (index == 0 && !flag)
        {
            this.totalCookTime = this.getCookTime(stack);
            this.cookTime = 0;
            this.markDirty();
        }
    }

    /**
     * Get the name of this object. For players this returns their username
     */
    public String getName()
    {
        return this.hasCustomName() ? this.furnaceCustomName : "Grinder";
    }

    /**
     * Returns true if this thing is named
     */
    public boolean hasCustomName()
    {
        return this.furnaceCustomName != null && !this.furnaceCustomName.isEmpty();
    }

    public void setCustomInventoryName(String p_145951_1_)
    {
        this.furnaceCustomName = p_145951_1_;
    }

    public void readFromNBT(NBTTagCompound compound)
    {
        super.readFromNBT(compound);
        NBTTagList nbttaglist = compound.getTagList("Items", 10);
        this.furnaceItemStacks = new ItemStack[this.getSizeInventory()];

        for (int i = 0; i < nbttaglist.tagCount(); ++i)
        {
            NBTTagCompound nbttagcompound = nbttaglist.getCompoundTagAt(i);
            int j = nbttagcompound.getByte("Slot");

            if (j >= 0 && j < this.furnaceItemStacks.length)
            {
                this.furnaceItemStacks[j] = ItemStack.loadItemStackFromNBT(nbttagcompound);
            }
        }

        this.furnaceBurnTime = compound.getInteger("BurnTime");
        this.cookTime = compound.getInteger("CookTime");
        this.totalCookTime = compound.getInteger("CookTimeTotal");
        this.currentItemBurnTime = getItemBurnTime(this.furnaceItemStacks[1]);

        if (compound.hasKey("CustomName", )
        {
            this.furnaceCustomName = compound.getString("CustomName");
        }
    }

    public NBTTagCompound writeToNBT(NBTTagCompound compound)
    {
        super.writeToNBT(compound);
        compound.setInteger("BurnTime", this.furnaceBurnTime);
        compound.setInteger("CookTime", this.cookTime);
        compound.setInteger("CookTimeTotal", this.totalCookTime);
        NBTTagList nbttaglist = new NBTTagList();

        for (int i = 0; i < this.furnaceItemStacks.length; ++i)
        {
            if (this.furnaceItemStacks[i] != null)
            {
                NBTTagCompound nbttagcompound = new NBTTagCompound();
                nbttagcompound.setByte("Slot", (byte)i);
                this.furnaceItemStacks[i].writeToNBT(nbttagcompound);
                nbttaglist.appendTag(nbttagcompound);
            }
        }

        compound.setTag("Items", nbttaglist);

        if (this.hasCustomName())
        {
            compound.setString("CustomName", this.furnaceCustomName);
        }

        return compound;
    }

    /**
     * Returns the maximum stack size for a inventory slot. Seems to always be 64, possibly will be extended.
     */
    public int getInventoryStackLimit()
    {
        return 64;
    }

    /**
     * Furnace isBurning
     */
    public boolean isBurning()
    {
        return this.furnaceBurnTime > 0;
    }

    @SideOnly(Side.CLIENT)
    public static boolean isBurning(IInventory inventory)
    {
        return inventory.getField(0) > 0;
    }

    /**
     * Like the old updateEntity(), except more generic.
     */
    public void update()
    {
        boolean flag = this.isBurning();
        boolean flag1 = false;

        if (this.isBurning()&& this.cookTime > 0)//keeps The Heat
        {
            --this.furnaceBurnTime;
        }

        if (!this.worldObj.isRemote)
        {
            if (this.isBurning() || this.furnaceItemStacks[1] != null && this.furnaceItemStacks[0] != null)
            {
                if (!this.isBurning() && this.canSmelt())
                {
                    this.currentItemBurnTime = this.furnaceBurnTime = getItemBurnTime(this.furnaceItemStacks[1]);

                    if (this.isBurning())
                    {
                        flag1 = true;

                        if (this.furnaceItemStacks[1] != null)
                        {
                            --this.furnaceItemStacks[1].stackSize;

                            if (this.furnaceItemStacks[1].stackSize == 0)
                            {
                                this.furnaceItemStacks[1] = furnaceItemStacks[1].getItem().getContainerItem(furnaceItemStacks[1]);
                            }
                        }
                    }
                }

                if (this.isBurning() && this.canSmelt())
                {
                    ++this.cookTime;

                    if (this.cookTime == this.totalCookTime)
                    {
                        this.cookTime = 0;
                        this.totalCookTime = this.getCookTime(this.furnaceItemStacks[0]);
                        this.smeltItem();
                        flag1 = true;
                    }
                }
                else
                {
                    this.cookTime = 0;
                }
            }
            else if (!this.isBurning() && this.cookTime > 0)
            {
                this.cookTime = MathHelper.clamp_int(this.cookTime - 2, 0, this.totalCookTime);
            }

            if (flag != this.isBurning())
            {
                flag1 = true;
                GrinderBlock.setState(this.isBurning(), this.worldObj, this.pos);
            }
            
        }

        if (flag1)
        {
            this.markDirty();
        }
    }

    public int getCookTime(@Nullable ItemStack stack)
    {
        return 200;
    }

    /**
     * Returns true if the furnace can smelt an item, i.e. has a source item, destination stack isn't full, etc.
     */
    private boolean canSmelt()
    {
        if (this.furnaceItemStacks[0] == null)
        {
            return false;
        }
        else
        {
            ItemStack itemstack = GrinderRecipes.Grinding().getGrindingResult(this.furnaceItemStacks[0]);
            if (itemstack == null) return false;
            if (this.furnaceItemStacks[2] == null) return true;
            if (!this.furnaceItemStacks[2].isItemEqual(itemstack)) return false;
            int result = furnaceItemStacks[2].stackSize + itemstack.stackSize;
            return result <= getInventoryStackLimit() && result <= this.furnaceItemStacks[2].getMaxStackSize(); //Forge BugFix: Make it respect stack sizes properly.
        }
    }

    /**
     * Turn one item from the furnace source stack into the appropriate smelted item in the furnace result stack
     */
    public void smeltItem()
    {
        if (this.canSmelt())
        {
            ItemStack itemstack = GrinderRecipes.Grinding().getGrindingResult(this.furnaceItemStacks[0]);

            if (this.furnaceItemStacks[2] == null)
            {
                this.furnaceItemStacks[2] = itemstack.copy();
            }
            else if (this.furnaceItemStacks[2].getItem() == itemstack.getItem())
            {
                this.furnaceItemStacks[2].stackSize += itemstack.stackSize; // Forge BugFix: Results may have multiple items
            }

            if (this.furnaceItemStacks[0].getItem() == Item.getItemFromBlock(Blocks.SPONGE) && this.furnaceItemStacks[0].getMetadata() == 1 && this.furnaceItemStacks[1] != null && this.furnaceItemStacks[1].getItem() == Items.BUCKET)
            {
                this.furnaceItemStacks[1] = new ItemStack(Items.WATER_BUCKET);
            }

            --this.furnaceItemStacks[0].stackSize;

            if (this.furnaceItemStacks[0].stackSize <= 0)
            {
                this.furnaceItemStacks[0] = null;
            }
        }
    }

    /**
     * Returns the number of ticks that the supplied fuel item will keep the furnace burning, or 0 if the item isn't
     * fuel
     */
    public static int getItemBurnTime(ItemStack stack)
    {
    	 if (stack == null)
         {
             return 0;
         }
        else
        { 
            Item item = stack.getItem();

            if (item instanceof ItemBlock && Block.getBlockFromItem(item) != Blocks.AIR)
            {
                Block block = Block.getBlockFromItem(item);

                
            }

           // if (item instanceof ItemTool && ((ItemTool)item).getToolMaterialName().equals("WOOD")) return 200;
          //  if (item instanceof ItemSword && ((ItemSword)item).getToolMaterialName().equals("WOOD")) return 200;
          //  if (item instanceof ItemHoe && ((ItemHoe)item).getMaterialName().equals("WOOD")) return 200;
         //   if (item == Items.STICK) return 100;
            if (item == DefineCraftModItems.GrinderHead) return 4000;
          //  if (item == Items.LAVA_BUCKET) return 20000;
          //  if (item == Item.getItemFromBlock(Blocks.SAPLING)) return 100;
          //  if (item == Items.BLAZE_ROD) return 2400;
            return  0;
        }
        
    }

    public static boolean isItemFuel(ItemStack stack)
    {
        if(DefineCraftModItems.GrinderHead != null){
        	return true;
        }
        return getItemBurnTime(stack) > 0;
    }

    /**
     * Do not make give this method the name canInteractWith because it clashes with Container
     */
    public boolean isUseableByPlayer(EntityPlayer player)
    {
        return this.worldObj.getTileEntity(this.pos) != this ? false : player.getDistanceSq((double)this.pos.getX() + 0.5D, (double)this.pos.getY() + 0.5D, (double)this.pos.getZ() + 0.5D) <= 64.0D;
    }

    public void openInventory(EntityPlayer player)
    {
    }

    public void closeInventory(EntityPlayer player)
    {
    }

   

    public int[] getSlotsForFace(EnumFacing side)
    {
        return side == EnumFacing.DOWN ? SLOTS_BOTTOM : (side == EnumFacing.UP ? SLOTS_TOP : SLOTS_SIDES);
    }

    /**
     * Returns true if automation can insert the given item in the given slot from the given side.
     */
    public boolean canInsertItem(int index, ItemStack itemStackIn, EnumFacing direction)
    {
        return this.isItemValidForSlot(index, itemStackIn);
    }

    /**
     * Returns true if automation can extract the given item in the given slot from the given side.
     */
    public boolean canExtractItem(int index, ItemStack stack, EnumFacing direction)
    {
        if (direction == EnumFacing.DOWN && index == 1)
        {
            Item item = stack.getItem();

            if (item != Items.WATER_BUCKET && item != Items.BUCKET)
            {
                return false;
            }
        }

        return true;
    }

    public String getGuiID()
    {
        return "minecraft:furnace";
    }

    public Container createContainer(InventoryPlayer playerInventory, EntityPlayer playerIn)
    {
        return new GrinderContainer(playerInventory, this);
    }

    public int getField(int id)
    {
        switch (id)
        {
            case 0:
                return this.furnaceBurnTime;
            case 1:
                return this.currentItemBurnTime;
            case 2:
                return this.cookTime;
            case 3:
                return this.totalCookTime;
            default:
                return 0;
        }
    }

    public void setField(int id, int value)
    {
        switch (id)
        {
            case 0:
                this.furnaceBurnTime = value;
                break;
            case 1:
                this.currentItemBurnTime = value;
                break;
            case 2:
                this.cookTime = value;
                break;
            case 3:
                this.totalCookTime = value;
        }
    }

    public int getFieldCount()
    {
        return 4;
    }

    public void clear()
    {
        for (int i = 0; i < this.furnaceItemStacks.length; ++i)
        {
            this.furnaceItemStacks[i] = null;
        }
    }

    net.minecraftforge.items.IItemHandler handlerTop = new net.minecraftforge.items.wrapper.SidedInvWrapper(this, net.minecraft.util.EnumFacing.UP);
    net.minecraftforge.items.IItemHandler handlerBottom = new net.minecraftforge.items.wrapper.SidedInvWrapper(this, net.minecraft.util.EnumFacing.DOWN);
    net.minecraftforge.items.IItemHandler handlerSide = new net.minecraftforge.items.wrapper.SidedInvWrapper(this, net.minecraft.util.EnumFacing.WEST);

    @SuppressWarnings("unchecked")
    @Override
    public <T> T getCapability(net.minecraftforge.common.capabilities.Capability<T> capability, net.minecraft.util.EnumFacing facing)
    {
        if (facing != null && capability == net.minecraftforge.items.CapabilityItemHandler.ITEM_HANDLER_CAPABILITY)
            if (facing == EnumFacing.DOWN)
                return (T) handlerBottom;
            else if (facing == EnumFacing.UP)
                return (T) handlerTop;
            else
                return (T) handlerSide;
        return super.getCapability(capability, facing);
    }

@Override
public boolean isItemValidForSlot(int index, ItemStack stack) {
	// TODO Auto-generated method stub
	return false;
}
}

 

GrinderGui.class

 

package com.DefineCraft.Blocks.Grinder;

import com.DefineCraft.Reference;

import net.minecraft.client.gui.inventory.GuiContainer;
import net.minecraft.client.renderer.GlStateManager;
import net.minecraft.entity.player.InventoryPlayer;
import net.minecraft.inventory.IInventory;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

@SideOnly(Side.CLIENT)
public class GrinderGUI extends GuiContainer
{
    private static final ResourceLocation FURNACE_GUI_TEXTURES = new ResourceLocation(Reference.ModID + ":" + "textures/gui/Grinder.png");
    /** The player inventory bound to this GUI. */
    private final InventoryPlayer playerInventory;
    private IInventory tileFurnace;

    public GrinderGUI(InventoryPlayer playerInv, IInventory furnaceInv)
    {
        super(new GrinderContainer(playerInv, furnaceInv));
        this.playerInventory = playerInv;
        this.tileFurnace = furnaceInv;
    }

    /**
     * Draw the foreground layer for the GuiContainer (everything in front of the items)
     */
    protected void drawGuiContainerForegroundLayer(int mouseX, int mouseY)
    {
        String s = this.tileFurnace.getDisplayName().getUnformattedText();
        this.fontRendererObj.drawString(s, this.xSize / 2 - this.fontRendererObj.getStringWidth(s) / 2, 6, 4210752);
        this.fontRendererObj.drawString(this.playerInventory.getDisplayName().getUnformattedText(), 8, this.ySize - 96 + 2, 4210752);
    }

    /**
     * Draws the background layer of this container (behind the items).
     */
    protected void drawGuiContainerBackgroundLayer(float partialTicks, int mouseX, int mouseY)
    {
        GlStateManager.color(1.0F, 1.0F, 1.0F, 1.0F);
        this.mc.getTextureManager().bindTexture(FURNACE_GUI_TEXTURES);
        int i = (this.width - this.xSize) / 2;
        int j = (this.height - this.ySize) / 2;
        this.drawTexturedModalRect(i, j, 0, 0, this.xSize, this.ySize);

        if (TileEntityGrinder.isBurning(this.tileFurnace))
        {
            int k = this.getBurnLeftScaled(13);
            this.drawTexturedModalRect(i + 56, j + 36 + 12 - k, 176, 12 - k, 14, k + 1);
        }

        int l = this.getCookProgressScaled(24);
        this.drawTexturedModalRect(i + 79, j + 34, 176, 14, l + 1, 16);
    }

    private int getCookProgressScaled(int pixels)
    {
        int i = this.tileFurnace.getField(2);
        int j = this.tileFurnace.getField(3);
        return j != 0 && i != 0 ? i * pixels / j : 0;
    }

    private int getBurnLeftScaled(int pixels)
    {
        int i = this.tileFurnace.getField(1);

        if (i == 0)
        {
            i = 200;
        }

        return this.tileFurnace.getField(0) * pixels / i;
    }
}

 

Everything else is on my github if you wanna go throw that to see something

 

https://github.com/x-j0nnay-x/Definecraft-1.9.4-Src

In your BlockGrinder class, in the onBlockActivated method, you should not be using EntityPlayer#displayGUIChest, you should be using EntityPlayer#openGui