Dear Vatsal, before you have cleared your subjects, ATKT doesn't really matter. You will be eligible for AIIMS PG if you fulfil other criteria. Listing the criteria for you:

• Should possess MBBS degree from an Institution recognised by MCI
• Should complete the 1 year mandatory rotational internship by the pre mentioned month
• General Category students should score a minimum of 55% in MBBS and it is 50% for SC,ST.