| GRO | Gamma Ray Observatory 
| Others |
| GRO | Gas Required for Operations
| Others |
| GRO | Gasoline Range Organics
| Others |
| GRO | Gateway Research Organization
| Others |
| GRO | General Register Office
| Others |
| GRO | General Routine Order
| Others |
| GRO | Generate Results and Opportunity
| Others |
| GRO | Generic Receive Offload
| Others |
| GRO | Genetic Regulating Office
| Others |
| GRO | Gerona, Spain
| Others |
| GRO | Get Rid Of
| Others |
| GRO | Ghost Recon Online
| Others |
| GRO | Girls for Rent for One
| Others |
| GRO | Global and Remote Observations
| Others |
| GRO | Global Reality Outsourcing
| Others |
| GRO | Global Realty Outsourcing
| Others |
| GRO | Goals And Risk Objectives
| Others |
| GRO | Going Right On
| Others |
| GRO | Government Records Office
| Others |
| GRO | Government Records Organisation
| Others |
| GRO | Government Relations Office
| Others |
| GRO | Grade Replacement Opportunity
| Others |
| GRO | Graduate Representative
| Others |
| GRO | Graduate Representative Organization
| Others |
| GRO | Grand Rapids Ophthalmology
| Others |
| GRO | Grass Roots Organizing
| Others |
| GRO | Greater Research Opportunities
| Others |
| GRO | Greater Research Opportunityes
| Others |
| GRO | Greater Rochester Orthopaedics
| Others |
| GRO | Green River Ordinance
| Others |
| GRO | Group Region Operating
| Others |
| GRO | Growth Related Oncogene
| Others |
| GRO | Growth Responsibility and Opportunity
| Others |
| GRO | Growth Results and Opportunity
| Others |
| GRO | Guaranteed Retail Override
| Others |
| GRO | Guaranteed Return Opportunity
| Others |
| GRO | Guest Relation Officer
| Others |
| GRO | Guest Relations Officer
| Others |