July 23rd, 2007
FileFront Network Staff
Join Date: June 7th, 2003
Rep Power: 25
You sure you installed it correctly?
There should be a gmod folder within the sourcemods:
Something like that. Then, reboot Steam and you see a Garry's Mod icon in the game list, then launch it by double clicking on it.
Personal opinions are not endorsed by FileFront