Here is some information about Gladstone Airport from Wikipedia:
Gladstone Airport (IATA: GLT) is located in the western suburbs of Gladstone, Queensland, Australia about 6km (8 minute drive) from the centre of the city.
The main supplier of scheduled passenger air services is QantasLink, a subsidiary of Qantas. Most services are non-stop to or from Brisbane Airport.
In March 2008, QantasLink was scheduled to operate about 38 return services per week (ie about 76 aircraft movements) between Gladstone and Brisbane using Dash 8 aircraft with seating from 50 to 72 passengers. In addition, a small number of direct flights operate to the north with the destinations of Rockhampton, Mackay, Townsville and Cairns as well as the odd service to or from Bundaberg in the south.
Gladstone Airport is owned and operated by the Gladstone Regional Council which took control of it by operation of the law when the Gladstone-Calliope Aerodrome Board was dissolved on 15 March 2007.
Here is the main Airline that services Gladstone Airport: