I really don’t see a freaking login button on the home page of Garry’s Mod.org
Top right, green button says “Sign in through STEAM”
Why did you make two threads about this?
If you don’t see it then you should be ok
You don’t need to make two threads about it http://www.facepunch.com/threads/1049782-How-do-I-login-to-garrysmod.org