Your composite GPA will be looked at first, which includes every post-high school course ever taken. Then your BCPM GPA will be looked at, which includes all math, biology, chem and physics classes, not just the prerequisites. So if your BCPM GPA is now a 3.0 (pretty low), you can fix it by taking an equal number of semester hours of upper-level science classes, getting As in all of them, and increasing it to 3.5 (reasonable).