Garrys mod or Couter strike?

I have played both games. I never really got into Garry's Mod as much as i did CS:GO. From what I have seen, Garry's Mod doesn't really seem like a game you can grind and just looks like you play it from time to time for fun. I used to grind CS back in the day so I would honestly have to side with it, but don't get me wrong, Garry's Mod is a GREAT game.