Not sure somebody that would speak so poorly about a program that helped them get into medical school out of sheer knee-jerk emotion is the best source.
Firstly, the SMP has ~180 students, and of those roughly 150 apply to GUSOM. Around 75 are given interviews, and ~25-30 are accepted. That's close to a 20% acceptance rate. Know how many applications Georgetown gets per cycle? Over 14,000 for under 200 spots - meaning 14,000 for under 170 spots because of the SMP. I'll let you do the math on the acceptance rate there. GU also is a Jesuit institution, so fitting their mission statement is very important.
Secondly, I know for a fact that BU, which is often done as a 2 year program, accepts a similar percentage from MAMS as GU does from the SMP, but they interview more of their students, meaning it's more competitive with your classmates. I also know somebody that completed the MAMS with over a 3.9 that was waitlisted at both GU and BU.
Lastly, to your point about wanting to see a 3.5+ uGPA - I had a 3.31 cGPA/ 3.19 sGPA, but a strong MCAT, strong clinical experience, and strong ECs. I know of other people that had under a 3.0 uGPA that were accepted. The SMP only takes people that they think can get into medical school - if you're accepted and you put in your time you'll get in.
Take-home: Having a high GPA coming out of the SMP helps tremendously but even with that you need a complete application (MCAT, ECs, etc.) and to perform well in the interview (which based on Pool's attitude here I doubt they did). And even with all of that, not everybody can be accepted. Most students who don't get into GU get in elsewhere, just like Pool did.