You can follow this for what happened last year.
http://www.gatecse.in/gate-cse-2015-result-responses/
After normalization last year set 2 got around 1-2 mark less and set 1 got like 5-6 more. This time we don't know as of now, but if many people use the rank estimation by Pragy - https://gateoverflow.in/mymarks/ we can do normalization in a couple of days itself.
64.3k questions
77.9k answers
244k comments
80.0k users