how to put my own 3d models in GMod

I have made a model that i want to put in Gmod (they are all the right format .VTF and .VMF) but i cannot figure out how to put it in GMod! can someone help me?

.vmf and .vtf is material not model. Anyway its goes into the Steam/steamapps/yoruname/garrysmod/garrysmod/materials/models/ and if you want to replace something just search for the not edited file with GCFScape.