- Gleditsch, K.G1
- Gleditsch, Kristen Gran, 1867-19461
- Glu?mer, Bodo von1
- Godwin-Austen, Henry Haversham, 1834-19231
- Goldbaum, David, 1858-19301
- Good, L. S.1
- Goode, J. Paul, 1862-19321
- Goodrich, Andrew Thompson, 1789-18451
- Gosack, Benjamin1
- Gould, James F.1
- Granlund, Erik, 1892-19381
- Grant, James A. (Geologist)1
- Graves, Richard1
- Gray, Frank A.1
- Gray, Ormando Wyllis, 1829-19121
- Great Britain Survey of India.1
- Great Britain. Army. Royal Engineers1
- Great Britain. Her Majesty's Stationery Office1
- Great Britain. Surveyor General of India.1
- Great Northern Iron Ore Properties (Firm : Saint Paul, Minn.)1