Which is better NMIMS Bangalore or Great Lakes Gurgaon PGPM, for someone who wants to switch from IT to marketing?

NMIMS Bangalore is better than Great Lakes Gurgaon PGPM, and Great Lakes’s Manipal campus is only better. 

The other campuses at Great Lakes are still in the growing stage, so I would suggest you not to choose them. Instead, you can opt for NMIMS, the faculties there are experienced, and they have industry exposure as well, plus you have a location advantage. Many companies have their offices in Bangalore, so it would be easy for you to grab a placement there. NMIMS also has a great student culture from various clubs and committees you can groom yourself.