Hey Ashutosh.

See the marks u have scored in the GATE exam is not enough for u to get admssioned in the IITs even under the OBC category but u can get some seats in the NITs under ur category criteria. U can also apply for other state colleges and private institutions for ur MTECH career.

I m providing u a link for ur help.

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/gate-college-predictor&ved=2ahUKEwjtgsq38ovhAhWDiXAKHSqhDr8QjBAwAnoECAgQCg&usg=AOvVaw1xiFTORDwDEpBZmadY5ZwG

Ask if ant query. Good luck