Missing textures for Goldeneye Source maps?

So I just tried to import a GE:S map into Gmod. I put all the proper folders in for the models and materials, but for some reason there are still many missing textures on almost all of the objects in the map. I tried importing the entire materials folder into Gmod but it still didn’t work.

Does anybody know how to find the textures?

Does nobody want to help?

Perhaps the mod requires Counter-Strike source content or something

But I have CS:S. Doesn’t Gmod have all the CS:S materials by default?