In order to work at Game stop you need to be 16 years old. You begin the job as a Game Associate. You need to be 18 in order to be promoted to Senior Game Associate, Assistant Manager, or Manager....
No, you cannot. However, I'm 16 and I work at Gamestop as a Game Advisor. You have to be at least 18 to become a manager, etc. It's a common misconception that you have to be 18 to work there at all....