Hello people, do you know how to import a model (like a skin or car) from gta sa to gmod? because I would like to import a skin model and turn it into playermodel and ragdoll, do you know how to do that?
GTA San Andreas models are in the .dff format (there's a plugin for 3DS Max that allows you to import those). Their textures are stored in .txd files (can be opened with TXD Workshop).
Once you got the model and textures, you'll have to compile it for GMod (frankly, for the most part, the process is the same as for any Source Engine game - there's a lot of tutorials for it on the site; example, example 2).