IIIT

Hello Vishal,
I am afraid your 76 percentile is quite low to get admission in any NIT and especially in CS branch. If one understands the percentile, then it is clear that 24% of almost 13 lakh students are above you. But then there could be some dynamics in admission process which may enable you to get admission somewhere. To help you I am attaching a link that will predict the college and the branch that you can get based on your performance in JEE Mains.
https://www.shiksha.com/engineering/jee-main-college-predictor

Hello Hritika, yes these two types of institutions have quite good name and ranking in the minds of students. But then there are other government colleges also in your own state or in some other states which also have good reputation academically as well as during placements. But gftis and iiit are definitely good institutions. Best wishes to you.