Bagasan Graham has signed a one-year contract with Cheltenham after a successful trial period.
The 18-year-old left winger, released by QPR last season, becomes Mark Yates' ninth new signing of the summer after completing the paperwork on Saturday afternoon.
Graham told the club's official website: "I'm really happy to have signed the contract with Cheltenham.
"It's a great opportunity for me to push my football career forward and now I'm ready to show everybody what I can do.
"This team is a great bunch of lads and they have really made me feel welcome and I'm sure there is a lot to come from all of us this season."