With a 2.5 cum/2.2 science undergrad GPA, even doing perfect in post-bac it will average to 3.0 or less (much too low to be competitive). 2006 AMCAS Grade Conversion Guide says you can "include your undergraduate post-baccalaurate courses in your cumulative undergraduate GPA. Do not include graduate courses in your cumulative GPA calculate separately". If they use a computer to filter out by GPA, I don't see how a low gpa'er can even get an interview. You can have a perfect post-bac, Masters, MCAT, and EC but if you can't get an interview, so what.