Check out the Yahoo TransferApp's group. They have a database of statistics include LSGPA, LSTA, UGPA, Rank, etc. http://groups.yahoo.com/group/transferapps/
I think the general consensus is that you have to be top 5% to pull of a T4 - T12/25 transfer. I'm top 5% at a T4 and was accepted to GULC as a transfer for fall. It seems those who fell outside the top 5% at low-ranked school get waitlisted/rejected. However, my experience/research only speaks to full-time programs, though I can't imagine a marked difference in the PT programs.