Hi Naveen, 

You need to specify the year in which you currently are, if you are in the final year of your engineering which is yet to be completed or have completed then you are eligible. 

I hope this helps you 

for more in depth information, you can use this link 

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

I hope you find your answer 

All the best

Dear,

Yes you are eligibility for the GATE with the B.Tech evening program form DTU. Even if you are doing M.Sc/Technology also.

ALL THE BEST.