Hello student if you full fill the eligibility criteria then no there's no problem you need to qualify jee main and advance for iit and then you can secure a seat yes there's chances you need to clear the reason of the gap years at the time of counselling.

For NITs, IIITs and CFTIs admissions, the candidates should have obtained a minimum of 75% aggregate marks or be in the top 20 percentile of their respective boards. For SC/ST category, a minimum of 65% marks required. It is important that they must have passed their class 12 examination in 2018 or 2019.

Also
Careers360 is conducting the All India Talent search exam where students of 11th and 12th PCM/PCB can test their knowledge and enhance their preparation by knowing their stronger and weaker areas and win prizes and scholarships worth 1.25 Crore.
If you are an Engineering or medical aspirant, it is a great opportunity for you. Take the test, perform the best, avail the scholarship and win prizes.

You can win exciting prizes such as:
50,000/- cash Prizes, Upto 100% Scholarship on JEE / NEET AI-Based preparation packages, Laptops, Smartphones, Amazon Echo, Careers360 Almanacs, Powerbanks, Upto 250/-  paytm *Cashback offer

Link: https://learn.careers360.com/careers360-talent-search-exam/?icn=qna&ici=interns

Feel free to comment if you have any doubt
Good luck