SGU does match quite well for residencies. Check out the link below. There are a bunch for Surgery & Anesthesiology and even a few for Ortho, Radiology, and Urology. So, to answer Protein's post, clearly SGU can pave a pathway to competitive residency programs... just look at the match lists.

SGU Residency Postings for 2007

Alumni - Academic Accomplishments - St. George’s University - Caribbean Medical & Veterinary School