Hello

According to your score and based on the previous year mop up (NSR) round, you might have chances to get admission in the following colleges:
IIT Gandhinagar: M.Tech Mechanical Engineering
SVNIT Surat: M.Tech Mechanical Engineering
Punjab Engineering College: M.Tech Mechanical Engineering

You have chances to get other branches also. Use the GATE College Predictor to check your other admission chances:

Good Luck!