[1.10.2] Server-side Gui Menus

[Elrol_Arrowsend]

First let me start out by saying, I know that GUIs are on the client side not server side, However, I want to be able to have the server open a GUI for a player who runs a command, then in that GUI find out when a player clicks an item, and when such an item is clicked have it either execute a runnable or run a command. There is already a mod/plugin that allows people to set up their own guis called VirtualChest. It works, but I need to be able to have the GUI and items i have displayed use info from the player that opened the GUI. For example, I would have one Item display the current blance of a player, but i want the balance to be the balance of the player that opened the GUI in the first place, VirtualChest cant do this, and it also cant execute runables, I have looked on google for a while but any tutorial i find is just for how to make a GUI, not how to make a GUI menu of sorts. My goal with posting here is to find a tutorial, or have someone explain to me how I would go about setting this up. I hope that I have explained what I am looking for, and if I havent just ask away. Thanks in advance!

[Draco18s]

Packets.

[Elrol_Arrowsend]

I had assumed as much, but how would i stop the items from being picked up, how would i populate the gui inventory with items, and all that