Hello,
Whether you are eligible for an IIT with an CGPA of 6.3/10 and a top rank depends on several factors, including the specific IIT's admission criteria and your category (General, OBC, SC, ST, etc.) Here in this article you will find more about IIT/JEE Advanced eligibility criteria.
I hope it will clear your query!!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile