Gmod does not detect other games from my steam (Portal,Portal 2,CS:GO etc.)

I have lots of games that (i think) gmod supports (by “supports” i mean it gives you extra things if you have them) i have Portal, L4D2, Portal 2, TF2, HL2 (and its episodes, deathmatch etc.) but gmod only detects TF2, other games doesn’t get detected and their content doesn’t get added to the game, sorry for my decent/still bad english but if somebody could help me i would be happy. :slight_smile:

Have you added them through the mount menu (main screen, bottom right)

sometimes i can’t believe how dumb i am, thanks.