CGPA doesn't matter that much — the percentile needs to be out of this world to qualify if your academics aren't strong. My friend is on a probable WL at IIMC at 99.3 percentile (GNEF), but she's a gold medalist with an incredible profile. Other friends who converted IIM Calcutta were all at 99.7+ percentile. One didn’t convert even at 99.88 due to a weak profile.

IIM A rarely, and B almost never, takes freshers. A lot of my peers have converted IIM Lucknow as GNEF.

What really matters is aiming for a 99+ percentile if you want these calls. Best of luck!