That's very interesting point. I came across Schools which I don't remember that accepted GPA = 2.90. I think it was midwest schools. But, one thing is for sure, Howard and Meherry average GPA's are 3.05 and 3.0 respectively. So, you could imagine their range.
Here are the numbers in general but schools can accept with lesser numbers if u have something else to offer which is better than other candidates: http://lifesci.rutgers.edu/~hpo/dstats.htm