Hello Chandra Shekhar,
I'm sorry to say that, with this marks there is rare chance to get NITs or IITs with this stream. If you score 100-150 marks more then there will be a definite chance to get a top NIT college.
For the details of GATE cutoff for NITs & IITs, please go through the links given below
https://engineering.careers360.com/articles/gate-cutoff-for-nits
https://engineering.careers360.com/articles/gate-cutoff-for-iits
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All the best.