Global Area Coverage 
Granular Activated Carbon 
Geological Association of Canada 
Governmental Advisory Committee 
granulated activated carbon 
Ground Attitude Control 
Grumman Aerospace Corporation 
General Average Contribution 
Get A Clue 
Government Advisory Committee 
Governmental Affairs Committee 
Groundwater Activated Carbon 
Gas Adsorption Chromatography 
gastric adenocarcinoma 
Gateway Amiga Club 
GCRC Advisory Comittee 
General Advisory Committee 
General Applications Cultural 
General Areas of Competence 
General Atomics Corporation 
General Automation Contractor 
General Aviation Center 
General Aviation Coalition 
General Avionics Computer 
Genetic Alterations in Cancer 
Genetic-based Admission Control 
Geographical Address Control 
Geospatial Advisory Committee 
Global Advisory Committee 
Global AIDS Coordinator