Without knowing what areas of interest you have, it would be impossible to rank them... but...
The University of Minnesota has a larger number of "non-specialized" grad students, which worries me a little (37/127), but Georgia has 20/109, so it's not a huge difference there. UofMinn and North Carolina State have an average of 6 years for PhD, compared to Georgia's 5.5 (both numbers are pretty standard though).
If you are undecided, UofMinn has a larger faculty than Georgia or North Carolina, so at least you'd have more research options, but going to a department without a more narrowed scope is definitely not wise.
While it's hard to compare grades, for course work, UMinn requires a graduate cpga of 3.3/4.0, North Carolina a 3.0/4.0, and Georgia a 2.9/4.0... Personally, I think Georgia has some weirdly low standards there.