| GEO | Gaming Enthusiast Online 
| Others |
| GEO | Gasoline Engine Oil
| Others |
| GEO | Gene Expression Omnibus
| Others |
| GEO | Genetically Engineered Organism
| Others |
| GEO | Genetically-Engineered Organism
| Others |
| GEO | Genuine Engine Oil
| Others |
| GEO | Genuine Essential Oils
| Others |
| GEO | Geode (GEOS executable) (Geoworks)
| Others |
| GEO | Geographical Extensions of Operations
| Others |
| GEO | Geography
| Others |
| GEO | Geography Exam Overview
| Others |
| GEO | Geology
| Others |
| GEO | Georgetown, Guyana
| Others |
| GEO | Georgian
| Others |
| GEO | Geospatial Environment Online
| Others |
| GEO | Geostationary Earth Orbit
| Others |
| GEO | Geosynchronous Earth Orbit
| Others |
| GEO | Geotechnical Engineering Office
| Others |
| GEO | Geothermal Exchange Organization
| Others |
| GEO | Getting Everything Out
| Others |
| GEO | Gifted Enrichment Opportunities
| Others |
| GEO | Global Earth Observation
| Others |
| GEO | Global Earth Oceans
| Others |
| GEO | Global Earth Organisation
| Others |
| GEO | Global Ecosystem Organization
| Others |
| GEO | Global Education Online
| Others |
| GEO | Global Education Oregon
| Others |
| GEO | Global Educational Outreach
| Others |
| GEO | Global Electric Vehicle Outlook
| Others |
| GEO | Global Engagement Operations
| Others |
| GEO | Global Environment Organisation
| Others |
| GEO | Global Environment Outlook
| Others |
| GEO | Global Environmental Outlook
| Others |
| GEO | Global Equity Organization
| Others |
| GEO | Global Excellence Operations
| Others |
| GEO | Gold Equivalent Ounce
| Others |
| GEO | GoldED for OS/2 Compiled configuration file
| Others |
| GEO | Golf Environment Organization
| Others |
| GEO | Good Earthkeeping Organization
| Others |
| GEO | Good Engineering Overlooked
| Others |
| GEO | Google Earth Outreach
| Others |
| GEO | Government Ethics Office
| Others |
| GEO | Graduate Employee Organization
| Others |
| GEO | Graduate Employees Organization
| Others |
| GEO | Graduate Employees' Organization
| Others |
| GEO | Graham East's Obsession
| Others |
| GEO | Graham Easts Obsession
| Others |
| GEO | Grantmakers For Effective Organizations
| Others |
| GEO | Graphical Earth Orbit
| Others |
| GEO | Grassroots Economic Organizing
| Others |
| GEO | Great Eastern Oregon
| Others |
| GEO | Green Energy Ohio
| Others |
| GEO | Green Energy Options
| Others |
| GEO | Green Entrepreneurship Opportunities
| Others |
| GEO | Group for Earth Observation
| Others |
| GEO | Group on Earth Observations
| Others |
| GEO | Growing Each Other
| Others |
| GEO | Growth Encouragement and Outreach
| Others |
| GEO | Growth Encouragement Outreach
| Others |
| GEO | Grupo Especial De Operaciones
| Others |
| GEO | Grupo Especial de Operaciones (Antiterroristas)
| Others |
| GEO | Guidelines Education Outreach
| Others |
| GEO | Guitar Effects Oriented
| Others |
| GEO | Gynasio Experimental Olimpico
| Others |