High Quality Content by WIKIPEDIA articles! Gulfport- Biloxi International Airport (IATA: GPT, ICAO: KGPT, FAA LID: GPT) is a joint civil-military public use airport located three nautical miles (6 km) northeast of the central business district of Gulfport, a city in Harrison County, Mississippi, United States. It is owned by the Gulfport-Biloxi Regional Airport Authority. In 2008, a total of 923,675 passengers utilized the airport, a 2.6% increase over 2007.