Now i got ur GA is quite diff. one where u don't receive payment but get tution waved. But somewhere it should be mentioned that u perform this much hrs of work as GA and ur this much credit tution would be waved. So confirm how many hours u r working as GA. it will be in ur record that u did this much hours of work as GA.

n pyara bro, i know u can work 40 hrs under CPT but not because u r graduating, but becoz u have only 3 credits or so left for last semester. i was talking about when u have regular full load credits.