- Gadallah, Leslie (1939- ) (stories)
- See www.sf-encyclopedia.com/entry/gadallah_leslie
- Gaddis, Peggy [i.e., Erolie Pearl Gaddis Dern] (1895-1966) (stories)
- Born in Gaddistown, Georgia.
- Gaddis, Vincent H(ayes) (1913-1997) (stories)
- Documentor of the paranormal; coiner of the term Bermuda Triangle. Born in Illinois.
- Gaffney, M. Brett (fl. 2010s) (stories)
- See mbrettgaffneyblog.wordpress.com
- Gafford, Sam (1962-2019) (stories) (art) (assoc.)
- See www.angelfire.com/me5/lordshazam/bio.html
- Gage, Joshua (fl. 2000s-2010s) (stories) (art)
- See www.vanzenopress.com/author_gage.htm
- Gail, Otto Willi (1896-1956) (stories)
- See www.sf-encyclopedia.com/entry/gail_otto_willi
- Gailey, Sarah (fl. 2010s) (stories)
- See www.sarahgailey.com
- Gaiman, Neil (Richard) (1960- ) (stories) (art) (assoc.)
- See en.wikipedia.org/wiki/Neil_Gaiman
- Gajdo, Gabriel ({c}1991- ) (stories) (art) (assoc.)
- See gabrielgajdos.deviantart.com
- GAK; pseudonym of Gregg Kanefsky (?-2019) (stories) (art) (assoc.)
- See www.gakart.com
- Gakov, Vladimir; pseudonym of Mikhail Kovalchuk (1951- ) (stories)
- See www.sf-encyclopedia.com/entry/gakov_vladimir
- Galbraith, Joanna (fl. 2000s-2010s) (stories)
- See www.joannagalbraith.com
- Galbraith, John Kenneth (1908-2006) (stories) (assoc.)
- See en.wikipedia.org/wiki/John_Kenneth_Galbraith
- Gale, Zona (1874-1938) (stories)
- See www.sf-encyclopedia.com/entry/gale_zona
- Galenorn, Yasmine (1961- ) (stories)
- See en.wikipedia.org/wiki/Yasmine_Galenorn
- Gales, Danielle N. (fl. 2010s) (stories)
- See daniellengales.com
- Galford, Chris (fl. 2010s) (stories)
- See galfordchris.com
- Galilei, Galileo (1564-1642) (stories) (assoc.)
- See en.wikipedia.org/wiki/Galileo_Galilei
- Gallagher, Karl (K.) (fl. 2010s) (stories)
- See selenite.livejournal.com
- Gallagher, Siobhan (fl. 2010s) (stories) (assoc.)
- See www.defconcanwrite.blogspot.com
- Gallagher, Stephen (1954- ) (stories) (art) (assoc.)
- See www.sf-encyclopedia.com/entry/gallagher_stephen
- Gallaher, John (1965- ) (stories)
- See en.wikipedia.org/wiki/John_Gallaher
- Gallardo, Adam (fl. 2010s) (stories)
- See www.adamgallardo.com
- Gallenkamp, Charles (1930- ) (stories) (assoc.)
- See prabook.com/web/charles.gallenkamp/633754
- Galler-Smith, Barbara (fl. 1990s-2010s) (stories)
- See en.wikipedia.org/wiki/Barb_Galler-Smith
- Galli, Aldo (fl. 2010s) (art)
- See www.fanbrush.co.uk
- Gallien, Sarah (fl. 2010s) (stories)
- See www.sarahgallien.com
- Gallion, (Nelda) Jane (1938-2003) (stories)
- See www.sf-encyclopedia.com/entry/gallion_jane
- Gallo, Irene (fl. 1990s-2010s) (stories) (assoc.)
- See igallo.blogspot.co.uk
- Galloway, Brad ({c}1976- ) (stories)
- See drinkingcoffeecola.blogspot.co.uk
- Gallun, Raymond Z(inke) (1911-1994) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/gallun_raymond_z
- Galouye, Daniel F(rancis) (1920-1976) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/galouye_daniel_f
- Gambarini, Livio (1986- ) (stories) (assoc.)
- See www.smashwords.com/profile/view/liviogambarini
- Gammon, David J(ohn) (1904-1996) (stories)
- See www.sf-encyclopedia.com/entry/gammon_david
- Gamow, George (1904-1968) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/gamow_george
- Gannon, Charles E. (fl. 1990s-2010s) (stories) (assoc.)
- See www.charlesegannon.com
- Gantz, Kenneth F(ranklin) (1905-1980) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/gantz_kenneth_f
- Garbell, Maurice A(dolph) (1914- ) (stories) (assoc.)
- See searchworks.stanford.edu/view/11693316
- Garber, M. E. (fl. 2010s) (stories)
- See megarber.wordpress.com
- Garby, Lee Hawkins (1890-1953) (stories)
- See www.sf-encyclopedia.com/entry/garby_lee_hawkins
- Garcia, Christopher J. (fl. 2000s-2010s) (stories)
- See fancyclopedia.org/christopher-j-garcia
- Garcia, Mathew Allan (fl. 2010s) (stories)
- See mathewallangarcia.wordpress.com
- Garcia, R. S. A. (fl. 2000s-2010s) (stories)
- See rsagarcia.com
- Garcia, Rudy Ch. (fl. 2010s) (stories)
- See www.discarded-dreams.com
- García-López, José Luis (1948- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Jos%C3%A9_Luis_Garc%C3%ADa-L%C3%B3pez
- García-Rosas, Nelly Geraldine (fl. 2010s) (stories)
- See www.nellygeraldine.com
- Gardiner, Jeff (fl. 2000s-2010s) (stories) (assoc.)
- See www.jeffgardiner.com
- Gardner, C(arolyn) A(dele) (fl. 1980s-2010s) (stories) (assoc.)
- See www.gardnercastle.com
- Gardner, Cate [i.e., Catherine J. Gardner] (fl. 1990s-2010s) (stories)
- See www.categardner.net
- Gardner, Curtiss T(arring) (1898-?) (stories)
- Born in Maryland; graduate of MIT; lived in Tice, Florida.
- Gardner, Erle Stanley (1889-1970) (stories) (assoc.)
- See en.wikipedia.org/wiki/Erle_Stanley_Gardner
- Gardner, James Alan (1955?- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/gardner_james_alan
- Gardner, John (Champlin, Jr.) (1933-1982) (stories) (assoc.)
- See en.wikipedia.org/wiki/John_Gardner_(American_writer)
- Gardner, Mark (fl. 2010s) (stories) (assoc.)
- See article94.com
- Gardner, Martin (1914-2010) (stories) (assoc.)
- See en.wikipedia.org/wiki/Martin_Gardner
- Gardner, Maurice B(enjamin) (1905-1977) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/gardner_maurice_b
- Garfinkle, Gwynne (fl. 1990s-2010s) (stories)
- See gwynnegarfinkle.com
- Garis, Howard R(oger) (1873-1962) (stories)
- See www.sf-encyclopedia.com/entry/garis_howard_r
- Garland, Mark Andrew (fl. 1980s-2000s) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/garland_mark_andrew
- Garland, Michael (fl. 1980s-2010s) (art)
- See www.michaelgarlandfineart.com
- Garland, Rosie (fl. 2010s) (stories) (assoc.)
- See www.rosiegarland.com
- Garland, T. W. (fl. 2010s) (stories)
- See twgarland.wordpress.com
- Garlick, Mark A. (fl. 1990s-2010s) (art)
- See www.markgarlick.com
- Garner, Alan (1934- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Alan_Garner
- Garnett, David S. (1947- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/garnett_david_s
- Garnett, Richard (1835-1906) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/garnett_richard
- Garrett, Eileen J(eanette Vancho Lyttle) (1893-1970) (stories) (assoc.)
- See en.wikipedia.org/wiki/Eileen_J._Garrett
- Garrett, (Gordon) Randall (Phillip David) (1927-1987) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/garrett_randall
- Garriott de Cayeux, Richard [born Richard Allen Garriott] (1961- ) (stories) (assoc.)
- See en.wikipedia.org/wiki/Richard_Garriott
- Garrity, Shaenon K(elty) (1978- ) (stories)
- See en.wikipedia.org/wiki/Shaenon_K._Garrity
- Garry, Christopher T. (fl. 2010s) (stories)
- See www.ctgarry.com
- Garson, Clee; house pseudonym (fl. 1940s-1950s) (stories)
- See www.sf-encyclopedia.com/entry/garson_clee
- Garson, Paul (1946- ) (stories)
- See www.sf-encyclopedia.com/entry/garson_paul
- Garson, Vaseleos; pseudonym of William J. Garson (1917-2000) (stories)
- See www.sf-encyclopedia.com/entry/garson_vaseleos
- Garstang, Clifford (fl. 2010s) (stories)
- See cliffordgarstang.com
- Garth, Will; house pseudonym (fl. 1930s-1940s) (stories)
- See www.sf-encyclopedia.com/entry/garth_will
- Garvey, Kevin Z. (fl. 1990s-2010s) (stories)
- See kevinzgarvey.com
- Garvin, Viola ({c}1883-1959) (stories)
- See desturmobed.blogspot.com/2019/01/viola-garvin-viola-taylor-mrs-j-l-garvin.html
- Garza, K. C. [i.e., Kennedy Cooke-Garza] (fl. 2010s) (stories) (assoc.)
- See kcgarza.artstation.com
- Garzón, Ricard Ruiz (1973- ) (stories)
- See www.escriptors.cat/autors/ruizgarzonr
- Gaskell, [Mrs.] Elizabeth Cleghorn (Stevenson) (1810-1865) (stories)
- Born in Chelea, London; lived in Manchester after marriage.
- Gaskell, Jane [i.e., Jane Gaskell Denvil Lynch] (1941- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/gaskell_jane
- Gaskell, Stephen (fl. 2000s-2010s) (stories)
- See www.stephengaskell.com
- Gaskins, Nettrice (1970- ) (stories)
- See en.wikipedia.org/wiki/Nettrice_Gaskins
- Gass, William H(oward) (1924-2017) (stories)
- See en.wikipedia.org/wiki/William_H._Gass
- Gaston, Bill [i.e., William James Gaston] (1927- ) (stories)
- Worked as planning engineer for Rolls Royce in East Kilbride, England, 1954-1983.
- Gates, Eleanor (1875-1951) (stories)
- Novelist and playwright; author of the play The Poor Little Rich Girl (1913), which coined the popular phrase. Briefly married to Frederick Ferdinand Moore. Born in Shakopee, Minnesota; died in Los Angeles, California.
- Gates, Jaym (fl. 2010s) (stories) (assoc.)
- See jaymgates.com
- Gatiss, Mark (1966- ) (stories) (assoc.)
- See www.sf-encyclopedia.com/entry/gatiss_mark
- Gatland, Kenneth W(illiam), F.R.A.S. (1924-1997) (stories) (assoc.)
- See www.bis-space.com/what-we-do/the-british-interplanetary-society/history/ken-gatland
- Gauge, Kim (fl. 2010s) (art)
- See www.kimgauge.deviantart.com
- Gauger, Eliza (fl. 2010s) (stories) (art)
- See elizagauger.com
- Gauger, Rick [i.e., Richard C. Gauger] (1942- ) (stories) (art)
- See www.sf-encyclopedia.com/entry/gauger_rick
- Gaughan, Phoebe (Adams) (?-2017) (art)
- See www.youtube.com/watch?v=OkCxM7liCLw
- Gault, William Campbell (1910-1995) (stories)
- Mystery writer, novelist. Born in Milwaukee, Wisconsin; lived in California.
- Gauquelin, Michel (1928-1991) (stories) (assoc.)
- See www.astrologer.com/bio/gauquelin.htm
- Gaut vel Hartman, Sergio (1947- ) (stories)
- See es.wikipedia.org/wiki/Sergio_Gaut_vel_Hartman
- Gautier, Judith (1845-1917) (stories)
- See www.sf-encyclopedia.com/entry/gautier_judith
- Gauvin, Edward (fl. 2000s-2010s) (stories)
- See www.edwardgauvin.com
- Gauvreau, R. Donald James (fl. 2010s) (stories)
- See www.whitemarbleblock.blogspot.co.uk