Government Printing Office 
Gemini Project Office 
General Post Office 
Group Policy Object 
Gemini Program Office 
Guidance and Procedures Officer 
Guidance Procedures Officer 
Good for Parts Only 
Group Purchasing Organization 
Guaranteed Purchase Option 
gastric peroxidase 
General Power Outlet 
general purpose outlet 
Geographic Provider Organization 
German Pediatric Oncology 
German Society of Pediatric Oncology 
Global Process Owner 
glutathione peroxidase 
glycerol-3-phosphate oxidase 
Governmenmt Printing Office 
Government Pension Offset 
Government Pharmaceutical Organization 
Government Project Officer 
Graduate Programs Office 
Group Policy Objects 
Group Processing Option