Hey,

Congratulations to you for scoring such good marks and rank  in your gate examination. Now coming to you question.

See you have not mentioned about the course you want apply for and go with in your mtech degree and that makes it difficult for me to help you with the exact possibility of colleges you can get at this rank or marks.

Below I have provided the link of gate 2020 cut off of different colleges including the NITs.

https://www.google.com/amp/s/engineering.careers360.com/articles/gate-cutoff-for-nits/amp

If you want cut off about any specific subject do tell me in the comment section . I will surely help you with that.

For general analysis refer the link given above.

Hope that helps.

Thank you.