How do you add costum textures ?

Yeah I know this has been asked some times but I ask again, how do you add costum texture s?

Put the .vmt and .vmf in:
C:\Program Files\Steam\steamapps\YOUR STEAM NAME HERE\garrysmod\garrysmod\materials
If you don’t know how to make the textures yourself, check out this tutorial.

Thanks mate, this worked.

is it the same for other games like css?

Yes.