Hey Shubham,
There are a number of institutes offering M.Tech without GATE score. So here is a list of such institutes.

• GITAM
• UPES University
• AMITY
• BITS Pilani
• VIT University
• VEL tech University
• PES University
• ISI
• IIITM Kerala
• IIIT Hyderabad
• SIT Pune
• Manipal institute of technology
• Karunya University
• Jamia Millia Islamia University

These institutes do not require GATE score, but the may conduct their own entrance exam.
The link below will provide information about the dates of entrance exam.
The admission process will be different for each institute, so check the official Websites and stay updated.
https://www.google.com/amp/s/engineering.careers360.com/articles/mtech-admissions/amp

Hope this helps!

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