Taking the GRE in Florence , South Carolina is not as easy as it might me. The test is given at the center listed below. As of 3/26/2008 the phone number doesn't seem to work. If that changes I will try to update this page. You must sign up by clicking on the link below. 

Florence - 5170

Prometric Testing Center
2141 C Hoffmeyer Road
West Gate Office Park
Florence , South Carolina 29501 -
United States of America
(843)667-3227

http://securereg3.prometric.com/ProfessionalHome.aspx