I found out that you can download Garry's Mod 10, 11 or 12 for free if you own the current version in your Steam Library. Fired up Gmod 10 and made this. : r/gmod

How to Get Garry's Mod 9 for Free & Without Half Life 2

Solved] Garry's Mod Keeps Crashing

Garry's Mod - GMod 10 on Source SDK Base 2006

Steam Workshop::The cool gmod addons me and my friends use

Steam Workshop::Doshirak&co's collection Gmod

Garry's Mod on Steam

Steam Workshop::Gmod FD

The creator of a paid mod for Gmod is leaking the IP addresses of anyone who pirates it. : r/Piracy

Garry's Mod on Steam

Steam Workshop::ARC9 Weapon Base