thx for the answer, about the renderlayers is something i already know but i'm trying to look an easier way to do it but i see is don't possible, anyways, thanks again, I will mark this solved once i talk to the mod authors to share their answer here.
I want to know if is possible to replace models of vanilla entities with custom models made with geckolib renderers, i was trying to add a renderer with the methos register of EntityRenderers but nothing, because the rendereres of gecko use the interface "IAnimatable".