Revolver Deagle skin

I think it’d be kinda cool

Quick question: if I grab a revolver deagle skin for CS:S will it work if I place the same files in Gmod and vice versa?

Yes but the world models wont.

What would I need to do to make the world models work? Would I have to remake them?

They just plain won’t work if you just drag and drop. They only work if you make it a swep and do a lot of stuff to them.