| GMO | Galactic Money Organizer
| Others |
| GMO | Gastric Medical Operation
| Others |
| GMO | Gene Making Organism
| Others |
| GMO | General Manager's Office
| Others |
| GMO | General Medical Officer
| Others |
| GMO | General Motors Opel
| Others |
| GMO | General Moving Object
| Others |
| GMO | Genetically Modified Organism
| Others |
| GMO | Genetically Modified Organisms
| Others |
| GMO | Get Monsanto Out
| Others |
| GMO | Girl Make Out
| Others |
| GMO | Global Media Outreach
| Others |
| GMO | God Move Over
| Others |
| GMO | God Moves Over
| Others |
| GMO | Goof Moon Oat
| Others |
| GMO | Grants Management Officer
| Others |
| GMO | Greater Milwaukee Open
| Others |
| GMO | Green Media Organization
| Others |
| GMO | Group Management Office
| Others |
| GMO | Group Member Organization
| Others |
| GMO | Guest Memory Operation
| Others |
| GMO | Gulf, Mobile and Ohio Railroad (Canadian National Railway)
| Others |