The schedule should be coming out soon (
check here). You can get a pretty decent idea of what the classes are by seeing the schedule from last year. There will definitely be some changes, especially with the course offerings for dental/medical school courses. Just a piece of advice, hold off on taking any dental/med courses. Give yourself some time to acclimate to the difficulty. The courses aren't all that hard, just a lot of material.
Nearly everyone here is trying to boost their GPA with challenging courses. You know yourself better than I, be reasonable with the courseload you plan to take. I pushed for a one-year completion, but looking back I probably should have done a 3 semester.
As for specific classes, take courses in subjects that interest you. Check the course descriptions for more info, and email professors about their courses if you need more info. Get the syllabus before class beings and check your exam schedule, set yourself up to do well. Required classes: Funds A (biochem), Funds B (cell/molec), and Funds physiology. you can take any 2 out of the three. Lots of stuff to memorize. pick your poison! the general consensus is that funds physio has more material than the other two but I thought it was an interesting class.
Other popular classes funds of pharmacology, toxicology I and II (you can take them in whatever order you want, no pre req or order), and gene expression. There's a facebook group too, join that and ask about other specific classes there.
If you are planning on graduating with the oral biology concentration read the requirements on the GSBS website and make sure you plan ahead. Very limited number of classes that qualify the major requirement but there are enough if you try.
Good luck.