The only entity I could see caring about high school GPA would be a college, but most of those would only be interested in the existence of a diploma or GED, they'd be looking at SAT or ACT scores. An employer isn't going to want the grades from the classes, only to confirm that he graduated. Maybe he should go get his own transcripts and post them. It's not like they're going to release them to anyone here. They're not even going to go to that trouble for an employer, and probably can't.
By the way, how did he do on the SAT/ACT? Or was he remedial when he first entered college? Has that part of christory ever surfaced?