Organizations
- General Post Office (disambiguation)
- General Post Office UK
- German Patent Office, (Deutsches Patent- und Markenamt)
- United States Government Printing Office, a federal government agency
- Green Party of Ontario, a policial party in Ontario, Canada
- Group purchasing organization, collective buying membership in the United States
- The Government Press Office (GPO), Israel's government press agency.
Read more about this topic: GPO
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