DACA without ever going to school?

My boyfriend entered without inspection before his 16th birthday with his aunt. He is now 27. He tried to enroll into school but gave up after they'd asked him for paperwork he did not have. He is getting his GED in a couple of weeks hopefully. Is it possible to submit affidavits as proof. Has anyone been approved without showing school records?

He needs to show proof that he is finishing his GED

Essentially this. He needs to submit evidence that he's enrolled in a GED program, he will also need to submit any kinds of evidence that he entered before turning 16 and resided in US since then.