Welcome to my favorite thread of all times (just kidding...kinda).
There is quite a difference between the "minimum" gpa to apply, and the gpa that would give you a good shot at getting in.
I think, if memory serves me, that I read that the minimum for in-state/contract applicants was a 2.5, and 3.0 for out of state. The average, for the class of 2011 - starting in the fall - was a 3.56/4.00. (At least as of a a few weeks ago, as alternates are selected I'm sure this will change). I don't know how big AU really is on the GRE (it DOES count) but I think they said the average for the students they admit is only in the mid 1100's. As long as you have a solid 500 in each section it seems the GRE won't hurt you. If your GPA is questionable, then you may hope to have a killer GPA to attempt to offset that somewhat.
Auburn (like most of US vet schools) accept their applications via VMCAS (which is an online application which you can start filling out in the summer, and is due by October 1st).. they also have a short supplementary application which they will request by November.
As far as the science electives... they like to see the "upper level 'ologies" - genetics, histology, parasit, etc. Anat/Phys are also good courses, I thought.
G'Luck.