| Acronym | Definition |
|---|
| GRO | General Register Office (UK) |
| GRO | Guerrero (Estado de México) |
| GRO | Graduate Research Opportunity (various schools) |
| GRO | Generic Receive Offload (computing) |
| GRO | Ghost Recon Online |
| GRO | Granular Restore Option (software) |
| GRO | Global Run-On (microbiology) |
| GRO | Gamma Ray Observatory |
| GRO | Greensboro, North Carolina (Amtrak station code) |
| GRO | Graduate Recruitment Opportunity (Georgia) |
| GRO | Glamorgan Record Office (UK) |
| GRO | Growth-Related Oncogene |
| GRO | Gallery Route One (California) |
| GRO | Guest Relations Officer |
| GRO | Greater Research Opportunities |
| GRO | Grass Roots Organizing |
| GRO | Groundfish (FAO fish species code) |
| GRO | General Routine Order |
| GRO | Government Relations Office |
| GRO | Gerona, Spain - Costa Brava (Airport Code) |
| GRO | Gasoline Range Organic |
| GRO | Gateway Research Organization |
| GRO | Growth Rate Operator |
| GRO | Grimaldi Robotic Observatory |
| GRO | Gardening and Resident Outreach (South Hadley, MA) |