There isn’t much of furry crap around Gmod whatsoever, but this, apart from that, is for something personal. Take it as a personal playermodel of mine.
I might ask someone to do a couple playermodels for these two characters of mine:
If you want to name them properly, the gray cat is Jack and the other one (siamese) is Ainhander.
EDIT: There’s this other ref for Ainhander, but beware, it’s NSFW: