It does not matter when you did your training. Its good atleast you did it successfully. PSUs consider GATE scores only and your learning experience in UG years. You can ofcourse apply for GATE exam and try to get a job in one of the best PSUs of the nation.

Hii,

GATE is a National level Common Entrance test to get admission in various Engineering Colleges to do Masters in Engineering. Through a better GATE Score one can also get a job in PSU. It's okay with your Industrial training. Even when you are in final year of Btech you can still Write the GATE exam. If you get the better GATE Score you will get the job in PSU's.

Hello aspirant!! Yes, you can apply for Gate examination and selection of PSU's is upto you because it totally depends on you as how many marks you score. All the best!!