Hello Hiran P!

Hopefully with that rank in AIIMS you may only get Newer AIIMS. Look, in Medical field you need to have a good practical exposure and for that your college must have large amount of patients. Patients only visit those hospitals which are older. 

So you must join that college which is much older and there is frequent patient visit. Like for All India Quota you can try in KGMC and other top colleges.

In Kerala, go for GMC Kozhikode, GMC Thiruvananthpuram, etc.

Better than GMCs of Kerala, I'll suggest you to join top colleges in India through NEET.

Check out the college predictor for a clearer idea of which colleges you might get. 

https://medicine.careers360.com/neet-college-predictor

Hope that helps!