@Donny039 - Simple answer: No, he is not a full time student. The usual rule for full time is 12 class room hours per week.
Technically the answer is it depends on how the school classifies him. Each school has it's own criteria for full time.
Refrences:
https://ttlc.intuit.com/community/taxes/discussion/if-my-son-is-doing-ged-course-can-he-be-considere...
https://www.investopedia.com/terms/f/fulltimestudent.asp
