Go north on I-85 to Lawrenceville-Suwanee Rd. (US 317). Turn left onto Lawrenceville-Suwanee Rd. Go approximately 2 miles and turn right onto Brogdon Rd. Brogdon Rd. is immediately after crossing Buford Hwy and the railroad tracks). Follow Brogdon Rd. for approximately 1 mile and turn left onto Brogdon Exchange (entering an industrial park). Follow Brogdon Exchange to the end - GSC is on the right.