IF he jus wants his G.E.D. thats alright but it iz still possible to get a Diploma now. I didnt graduate on time but went to an alternative school ( peoples stilll gettin they GED and/or Diploma) I signed up the summer after high school, they tellin me I can jus go for my GED then the Diploma, which I didnt want, I told em I jus wanna go for the Diploma even though itll take longer.
Well they told me when gettin GED, you can still go for the Diploma which it adds like 5 credits for a Diploma. So check around for schools that has that kind of program still available for peoples such as your friend.