new game I found

Hey Guys I found this Game called:Garry's mod its a physical sandbox game.

i was wondering how can it be hacked

It can't. Most games on STEAM ( If thats where you got it. ) Are VAC Secured. But, I can give you a little tip for Garry's Mod... Look for a LUA ( GMod Coding Language ) Aimbot on Garrysmod.org

You can easily find one. I use nBot.

As being full sandbox, you are a bitch if you want hacks for it.
Also, why would anyone just kill themselves and hack?
That is "minge" stuff
But it has some aimbots, what shoot at corpses until you aim away and back. And wallhacks.
Garrysmod dot org has some. Just search for "Hack Pack" and it comes up. ON SITE MADE BY GARRY HIMSELF :O