Hello Anmol,

With the quoted JEE mains score you might get a seat in GFTI. But there's an issue with your eligibility. For admissions to NITs/ IIITs/ GFTIs you need to have secured a minimum 75% marks in class XII or be in the top 20 percentile in your class XII exam. For SC/ ST candidates, the eligibility criteria are to secure 65% marks in class XII or equivalent exam. 

With 72% your eligibility is doubtful. But if you are a SC/ST candidate you are eligible for GFTIs, else it's unfortunate. 

I hope this helps.