GLA or Gla may refer to:
Entertainment GLA (album), by Scottish alternative rock band Twin Atlantic Great Lakes Avengers, a fictional comic hero group
Organisations Gangmasters Licensing Authority, a British regulatory body General lighthouse authority, provides navigational aids in Britain and Ireland Georgia Library Association, United States Ghana Library Association GlassBridge Enterprises, where GLA was its former NYSE ticker symbol God Light Association, a Japanese new religion founded by Shinji Takahashi Great Lakes Airlines, an American airline Greater London Authority Guam Library Association
Science and technology Alpha-galactosidase, a glycoside hydrolase enzyme GLA (gene), an encoding of the enzyme alpha-galactosidase A Gla domain, a protein domain Gamma-Linolenic acid, a fatty acid Linde–Buzo–Gray algorithm (also called Generalized Lloyd Algorithm), a vector quantization algorithm
Other uses Gla, a Mycenaean fortification in Greece GLA (LGBT), meaning gay and lesbian alliance Gross leasable area, in real estate, the total floorspace of a property GLA University, in Mathura Uttar Pradesh, India Glamorgan, historic county in Wales, Chapman code Glasgow Airport, IATA call-sign Global Leadership Adventures, an international high school study abroad program Mercedes-Benz GLA-Class, a car Scottish Gaelic, ISO 639-2 & ISO 639-3 language codes