Hello,
The documents you need to submit as mentioned on the official website are, GATE/GPAT/PGECET Score card and halltickets, Degree original certificates and marks memos, 12th/diploma certificates and marks memos, SSC marks memos and original certificates, Study certificate from 10th to graduation, Caste certificate(if you have reservation), residence certificates of father/mother for 10 yrs in ap, Graduation transfer certificate, Ration card, Aadhar card.
Good Luck!