I'm currently an SMP student at Georgetown, but here's what I've posted about GEMS in some other threads:
I don't want to seem dramatic, but I really feel like Georgetown is a place of second chances. They pioneered this process and they also have another program called GEMS, which is for minority/disadvantaged med school reapplicants. I heard from someone in the program that they are basically guaranteed a spot at Georgetown if they get at least 80% in their classes, but it's apparently really hard to do that, lol.
Personally, I would recommend an SMP. Or, if you're truly desperate and have no other options, you could apply to GEMS. You're guaranteed a spot at Georgetown. From what I hear, it's a very intense program with a pretty high attrition rate. In recent years, like only 17/25 made it through the program. I heard that GEMS students are told something like this: "The spot is yours; it's yours to keep or lose." Pretty heavy, lol.
It's also free!
EDIT: Also, their whole curriculum is PBL. Like, someone in the program told me that they can be called up at random at any time to present on a topic that they've learned. Seems kind of scary. But I think the advantage is that you are molded into an excellent student by force, lol. It's either that, or you get kicked out, lol.
