GSO
- GCC Standardization Organization
- GSO Capital Partners
- GSO Stadium
- GSO projection
- Gadolinium oxyorthosilicate
- Gamer Symphony Orchestra at the University of Maryland
- General Logistics Systems
- General Staff Officer
- General Statistics Office of Vietnam
- Generic segmentation offload
- Geosynchronous orbit
- Gothenburg Symphony Orchestra
- Government Shipping Office
- Gram-Schmidt orthogonalization
- Grassroots Support Organization
- Greenville Symphony Orchestra
- Guangzhou Symphony Orchestra
- Piedmont Triad International Airport
- Southwest Gbaya language