To check your chances in various colleges based on your score and category, you should try Careers360 college predictor and rank predictor.

Link for Careers360 rank predictor:- https://engineering.careers360.com/gate-college-predictor

All the very best and good luck.

Apply all IITs and NITs though chances are less. Try spot admission counselling in NITs at the end of counselling. Apply IIITs, Central Unversities, BITs, VIT, Manipal.....etc.

YOu can moreover apply for the private universities or you can move on state wise which will be more better

Good luck.