Hey Vignesh.

See the marks u have scored is enough for u to get admissioned in some of the NITs for pursuing ur higher studies in the field of ur interest under ur OBC category. U can also opt for other good colleges like DTU for ur admission that except the lower marks in GATE under CIVIL branch to give admission.

I m providing u a link of college predictor hope it help u.

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 any query. Good luck