Encyclopedias, Almanacs, Transcripts, and Maps
- Giant Rock Space Convention
- Giardia and Giardiasis
- Gibbons and Siamangs
- Gibbons and Siamangs
- Gibbons: Hylobatidae
- Gibier, Paul (1851-1900)
- Gibson, Edmund P(aul) (1898-1961)
- Gichtel, John Georg (1638-1710)
- Gideon Algernon Mantell
- Gidlow, Elsa (1898-1986)
- Gidney, William "Starets" (1972-)
- Giffard, Ellen Hovde (1925-)
- Gil Eannes
- Gil Eannes Passes the Point of No Return at Cape Bojador—And Inaugurates a New Era in Exploration
- Gila Monster and Mexican Beaded Lizard: Helodermatidae
- Gilbert White
- Gilbert, Mostyn (d. 1992)
- Gilbert, R(obert) A(ndrew) (1942-)
- Giles of Rome
- Gilles Personne de Roberval