there was a pretty good variety in my scripps post-bacc class. like it says above, the best thing to do would be to talk to jodi olson at the scripps program.
but i think the most important factor, rather than your undergrad gpa, would be your dedication, interview/recommendations, and evidence of being able to handle a rather strenuous load.
some previous experience in health care related environment would probably also help convince them that you've carefully considered what this decision means, and are determined to go through with it...