Part Time M.Tech

Hi Abhishek,
I am sorry to tell you that all the top colleges accept GATE result. Please find the link below for the top colleges accepting GATE:
https://www.shiksha.com/mba/ranking/top-mba-colleges-in-india-accepting-gate/2-2-0-0-3298.

There is no college which can give you admission in part-time.
These type of courses are professional courses. You can't get admission via part-time or distance mode. You have to study hard for M.Tech. 70% attendance is mandatory to appear in the exam.

This chttps://www.jmi.ac.in/aboutjamia/departments/Civil-Engg/courses-name/MTechEnvironmental_Science_and_Engineering_Part_time-265/1.
Also, check this list to check all regular and part time courses provided by JMI.
Link: https://www.jmi.ac.in/studyatjamia/courseslist.

Evening/distance/online/part time engineering courses are not valid any more as per the latest supreme court verdict, hence would recommend you to join regular B.Tech course for better career prospects:
http://www.tribuneindia.com/news/nation/no-technical-education-through-correspondence-says-supreme-court/491819.html

Here is the link from which you can get all the colleges affiliated and approved by AICTE:
https://files.acrobat.com/a/preview/7c0b3d2b-36d0-4f20-9ff1-7d9b086b28d0