Dear Naveen, Aadhar card is not a mandatory document for entrance examinations or Academic admission procedures. So that way you need not be worried. But to be on a safer side, please reach out to the GATE helpdesk at: thegatehelpline@gmail.com (mailto:thegatehelpline@gmail.com) . During the examination time you can still take your Aadhar Card for verification purposes. You also can take either a Driver's license or Voter Id card for verification. Just write to the help desk please.