I definitely think that lower gpa's (granted, above a 3.0) can be more than compensated for by great MCAT composites. Take some sample MCATs and see how you do, I think if you can get above a 29 you have a shot especially at D.O. schools where they evaluate applicants more holistically. As a side note, alot depends on your BCMP gpa- if that is lower than a 3.2 you may have a rougher time with adcoms.