Gmod wont show that I have CS, L4D

Hey, for some reason, my Gmod doesnt show any folder or nothing that has any of my counter strike maps / chars… ANYHTING at that matter. Please, can somebody describe to me EXACTLY what I need to do, dont just assume i know what your talking about. New to this kinda stuff, thankyou.

Well, A pirated game won’t show up. Also L4D doesn’t show up in GMOD you need to add it on.

It isnt pirated though, i officialy have counter strike 1.6 … I have had it for years

You need Counter Strike: Source. 1.6 uses a different engine.

so, since i have cs 1.6, it will never show up in Gmod, unless i buy CS:S 0.o