Dr. Su,
As the previous poster commented you shouldn't be too worry about your GPA. Right now, instead of spending time and worrying about your GPA, start (if you haven't already) preparing a well written and strong application essay. I guarantee you that your interviewer will thoroughly read it. In your essay, please do not just state your research accomplishment but how this research made you want to become a physician. Adcom people seem to like to see how your clinical experience helped shaped your decision in becoming an MD.
You should also try to obtain a strong recommendation (if you haven't already done so) from your AIDS research PI.
A strong application letter, strong rec. letters, a 30 on your MCAT, and a quite decent GPA combined will give you a fairly strong case. You should not just limit yourself to state schools but also try out for some upper ranked schools as well 🙂 You never know...
Best of luck on your applications