Other
- General ophthalmic services, health care services for the eyes
- Georgia Ornithological Society, American state-based bird club
- Gloucestershire Old Spots, a rare breed of domestic pig
- Gos (bird), Scottish English term for Northern Goshawk
- Grange-over-Sands railway station, England, National Rail station code GOS
- Gross operating surplus, the surplus due to owners of incorporated businesses
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