Will gmod 13 overwrite the old gmod 10

Well, title sas it all. Will it be an update to the game, or a complete separate one?

If so, i gotta start recoding hehe

It will update the game when it releases, for now it’s only separate because of beta testing.

oh so if you own garrys mod you automaticly get gmod 13?

Right now you must be invited to play GM13 beta, which has seperate game client. Once beta testing is over and GM13 is released, it will replace GM10 for everyone.