16% of last year's admits had a GMAT score below 680. Ross, and many other top MBA programs, are looking for much more than a GPA and GMAT.
I highly recommend interviewing on-campus, especially if you've never been to Ann Arbor. It's a fantastic college town. There are lots of bars and restaurants integrated with central campus (which is where Ross is). Plenty of housing that is extremely close. Most of the town is really walkable.
They've also done a great job clustering many of the graduate schools together. Business, law, education, social work, and public policy are all together on the same "block" so to speak, so taking courses at other schools is logistically easy and the graduate schools feel like a smaller community within the large university.