If you want to know how the military scores apps go here:
http://airforcemedicine.afms.mil/idc/gr ... CTB_047647.
The GMO/FS applicant will almost always score higher than any med student.
As an aside, if you have to do the GMO/FS, its not too bad. The year I graduated from school none of the 35 applicants for ortho got accepted. So, I did it and decided to keep doing it for 5 years because I was having so much fun. As a flight surgeon, you'll be way closer to the real AF mission than as an orthopod.
I'm about to finish my deferred residency now and go back in. I'm looking forward to it.