Hi,
Based on your rank you do have a fair chance of getting CSE in IIIT Gwalior.
You can check last year cutoff of IIIT Gwalior here - https://engineering.careers360.com/articles/jee-main-cutoff-for-iiit-gwalior
You can also check out what colleges can you get based on your rank with the college predictor -
JEE Main College Predictor – Know your College Admission Chances Based ...
Good luck.
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