Hello Sai Raghava,

Congrats, you have a nice chance of getting Tech Aerospace, the marks u have scored is enough for u to get admission in the NITs for pursuing ur  MTECH career in the field of ur interest. With these marks, u will get NITs of average and lower rank as the top NITs cut off is approx 600. Here is the link for any additional information required, click on this link to know more-https://engineering.careers360.com/articles/gate-cutoff-for-nits and you can also use the GATE college predictor and PSU predictor : -https://engineering.careers360.com/gate-score-predictor

Hope this helped u. 

Good luck