Hello,

There is no age limit for gate exam so yes you will be eligible to give GATE 2021. Candidates must have passed graduation in engineering/technology or Master’s degree in any relevant science subject. Candidates in pre-final or finaly year of their qualifying degree also eligible to appear for GATE 2021. As you have said that you have completed your B.Tech you are eligible to give GATE Mechanical 2021 exam. Please click the below link to know more about GATE.

https://engineering.careers360.com/articles/gate-eligibility-criteria