KGMU is the downtown Greenville, S.C. Airport. FBO is TAC air......though I didn't see personnel for this FBO or enter their lobby, I was permitted to park right outside the gate by the plane. Mike Rigg, pilot, assisted me with using his passcode for me to enter and we loaded our pup and headed to Knoxville for the WBIR and USA Today filming. Pet friendly and easy access. I did not ask about fuel discounts but maybe Mike will chime in if he reads this?