- Geographical Surveys West of the 100th Meridian (U.S.)1
- Geographisches Institut (Weimar, Thuringia, Germany)1
- Geological Survey (U.S.). Water Resources Division. Wisconsin District1
- Golden Gate Transit1
- Golden Gate Transit District1
- Government of the Autonomous City of Buenos Aires1
- Great Britain. War Office. General Staff. Geographical Section.1
- Green Info Network1
- Griffin, Robert M.1
- Grossner, Karl, 1951-1
- Gräf, A. (Adolf), active 1855-18781
- Gunche, Wiebeck y Turtl1
- HJW Geospatial, Inc.1
- HUD1
- Hall, Sidney1
- Hall, Sydney1
- Hall, Sydney, fl. 1818-601
- Hall, Wm. Ham. (William Hammond)1
- Haoran (Frank) Jiang1
- Harimaya, Kyūbē1
