Deep in my heart, I hope this post is satirical ... though I'm fairly certain it is not:
1. What does your undergraduate GPA have to do with general surgery
2. Hypothesizing an MCAT score is absurd. You plan on doing quite well? Is there anyone who takes the MCAT with the mentality of bombing it? "Well, I haven't taken the MCAT yet ... but I plan on performing like ass." No. Until you've studied, taken lots of practices exams, etc, don't predict anything. Actually, don't predict anything ever ... do the best you can, period.
3. Don't try to pick a field right now. You're too young, too inexperienced, etc. Over half the people change their mind in med school, so planning your life around a potential field right now just doesn't make sense. Take the MCAT, do well, apply broadly, do well in pre-clinical, do well on COMLEX/USMLE, do well in rotations, audition, THEN worry about matching. You're at point A worrying about point Z ... don't bother, ya know??
4. Here is a listing of all AOA residencies (including G-surg) and where they are located:
http://opportunities.osteopathic.org. For ACGME, check freida.