games required?

in order to mount content do you have to install the games or just own them.

A friend of mine told me that all I have to do is install the games, mount them, then delete them and they will still work.

is this true?

Install any Source Engine game, run it at least once, then enable the content in Garry’s Mod and restart Garry’s Mod and play with your new stuff.
I think uninstalling would remove the files the stuff needed though, so make sure you have enough room.

bump for more info

That’s all the info you need.