| GPO | Garritan Personal Orchestrator 
| Others |
| GPO | General Parts Operation
| Others |
| GPO | General Pico Airport
| Others |
| GPO | General Portage Overlay
| Others |
| GPO | General Post Office
| Others |
| GPO | General Post Office, United Kingdom
| Others |
| GPO | General Power Output
| Others |
| GPO | General Provisions for Occupancy
| Others |
| GPO | General Pupose Outputs
| Others |
| GPO | General Purpose Outlet
| Others |
| GPO | General Purpose Output
| Others |
| GPO | General Purpose Outputs
| Others |
| GPO | GENI Project Office
| Others |
| GPO | Genoa Post Office
| Others |
| GPO | German Performance Options
| Others |
| GPO | German Precision Optics
| Others |
| GPO | Gestalt Practitioner in Organisations
| Others |
| GPO | Gestalt Practitioner in Organizations
| Others |
| GPO | Get Page One
| Others |
| GPO | Giant Pacific Octopus
| Others |
| GPO | Global Partnership for Oceans
| Others |
| GPO | Global Proces Optimization
| Others |
| GPO | Global Process Owner
| Others |
| GPO | glycerol-3-phosphate oxidase
| Others |
| GPO | Google People Operations
| Others |
| GPO | Government Pension Offset
| Others |
| GPO | Government Pharmaceutical Organization
| Others |
| GPO | Government Post Office
| Others |
| GPO | Government Press Office
| Others |
| GPO | Government Printing Office
| Others |
| GPO | Government Printing Office (U.S.)
| Others |
| GPO | Government Publications Office
| Others |
| GPO | Government Publishing Office
| Others |
| GPO | Gradual Progressive Overload
| Others |
| GPO | Graduate Programs Office
| Others |
| GPO | Grand Parents Obliterated
| Others |
| GPO | Grand post office
| Others |
| GPO | Graphics Processor Original
| Others |
| GPO | Great Pig Out
| Others |
| GPO | Green Party of Ontario
| Others |
| GPO | Grosser Preis Von Osterreich
| Others |
| GPO | Group Policy Object
| Others |
| GPO | Group Policy Objects
| Others |
| GPO | Group Policy Option
| Others |
| GPO | Group Purchasing Organization
| Others |
| GPO | Group Purchasing Organizations
| Others |
| GPO | Guaranteed Purchase Option
| Others |
| GPO | Propylene Oxide Rubber
| Others |