There is a good chance you can get the CSE branch at GTBIT with a 71%ile in JEE Mains 2023 under the OBC Sikh Minority quota.

Based on information available online (sources like Careers360), the closing rank for the CSE branch at GTBIT for the OBC Sikh Minority quota in 2023 was significantly lower than the general category cutoff. Reports suggest it could be around 1.5 to 2 lakh rank.

With a 71%ile, your rank would likely be much better than that (generally in the tens of thousands).

If the exam is tougher, the cut-offs for all colleges and branches might decrease proportionally. An increase in applicants, especially for the OBC Sikh Minority quota, could slightly raise the cut-off for that category.

Overall, with a 71%ile and the OBC Sikh Minority quota, your chances of getting CSE at GTBIT are very good. But staying updated on official information will give you complete certainty.

https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp

I hope it helps!