 G. & C. Merriam Company USA | 1 | 1978 |
 G. B. Fischer Germany | 2 | 1953 - 1962 |
 G. Bakalov Bulgaria | 6 | 1974 - 1988 |
 G. Bell And Sons UK | 3 | 1923 - 1961 |
| G. Braun GmbH & Co. KG Germany | 1 | 1999 |
| G. Grote'sche Verlagsbuchhandlung Germany | 1 | |
| G. Henle Verlag Germany | 4 | 1958 - 1978 |
| G. K. Hall & Company USA | 3 | 1978 - 1988 |
| G. P. Putnam's Sons USA | 92 | 1898 - 2024 |
| G. P. Putnam's Sons / The Science Fiction Book Club USA | 1 | 1963 |
| G. Schirmer USA | 17 | 1926 - 2004 |
| G. T. Foulis UK | 2 | 1945 - 1956 |
| G. Whizzard André Deutsch UK | 1 | 1976 |
| G.. Labs USA | 1 | 2005 |
 G.E.P France | 1 | 1998 |
 G.F. Callenbach N.V. - Nijkerk Netherlands | 1 | |
 G.S. Borker India | 1 | 1945 |
| G/L Regal Books USA | 1 | 1967 |
| G2 UK | 2 | 2009 - 2012 |
| G2 Entertainment Ltd UK | 1 | 2020 |
 Gabbiano Italy | 1 | 1966 |
| Gabler Germany | 1 | 1998 |
 Gad Denmark | 2 | 1994 - 2018 |
| Gads Forlag Denmark | 1 | 2001 |
 Gage Publishing Canada | 4 | 1974 - 1978 |
| Galahad Books USA | 3 | 1980 - 1992 |
 Galaxia Romania | 1 | 1992 |
 Galaxia Gutenberg Spain | 1 | 1999 |
| Galaxis "94" Romania | 1 | 1994 |
| Galaxy 44 Publishing USA | 1 | 2016 |
| Galaxy Novels USA | 19 | 1950 - 1958 |
| Gale & Polden UK | 6 | 1940 - 1950 |
| Gale Research Company USA | 1 | 1972 |
| Galeria Kaufhof Germany | 1 | 2007 |
| Galiani Berlin Germany | 4 | 2014 - 2016 |
| Gallery USA | 8 | 1985 - 2017 |
 Gallery 360° Japan | 1 | 1996 |
| Gallery Books USA | 4 | 1984 - 2018 |
 Gallery Books Australia | 1 | 2023 |
| Gallery Books UK UK | 3 | 2021 - 2023 |
| Gallery Press UK | 1 | 1988 |
| Galley Press UK | 4 | 1982 - 1988 |
| Galliard UK | 1 | 1971 |
| Gallic Books UK | 4 | 2007 - 2020 |
| Gallimard France | 49 | 1938 - 2015 |
| Galloping Dog Press UK | 1 | 1987 |
| Gallucci Italy | 1 | 2014 |
 Galway City Council Ireland | 1 | 2002 |
| Games Workshop UK | 5 | 1992 - 1993 |
| Gamma Libri Italy | 2 | 1986 - 1989 |
| Gangolf Rost Verlag, Westheim Bei Augsburg Germany | 1 | 1946 |
| Gannet Press UK | 1 | 1953 |
| Garamond International Romania | 2 | 1992 |
| Garden City Books USA | 1 | 1961 |
| Garden City Publishing USA | 1 | 1948 |
| Garden Editoriale Italy | 2 | 1965 - 1989 |
| Garden Way Publishing USA | 1 | 1992 |
| Gareth Stevens Publishing USA | 1 | 2015 |
| Garland Publishing USA | 8 | 1975 - 1996 |
| Garland Publishing Inc. International | 1 | 1991 |
| Garzanti Italy | 50 | 1958 - 2018 |
| Gateshead Council UK | 1 | 2006 |
| Gateshead Metropolitan Borough Council Department Of Education UK | 1 | |
| Gateway UK | 1 | 1990 |
| Gauke Verlag Germany | 1 | 1986 |
| Gauntlet, Inc. USA | 1 | 1991 |
| Gay Baldwin UK | 1 | 1992 |
| Gaywood Press UK | 9 | 1949 - 1953 |
| Gazette Printing Company Canada | 1 | 1967 |
| GBF UK | 1 | 2018 |
| Gearfab USA | 11 | 2017 - 2024 |
 Gebers Sweden | 1 | 1959 |
| Gebr. Bramstedt Germany | 1 | 1962 |
| Gebr. Kluitman Netherlands | 3 | |
| Gebr. Kluitman Alkmaar Netherlands | 1 | |
| Gebr. Knabe Verlag, Weimar East Germany | 2 | 1959 - 1975 |
| Gebrüder Jänecke Germany | 1 | 1973 |
| Gebrüder Weiss Verlag Germany | 4 | 1960 |
| Gebrüder Weiss Verlag - Berlin Germany | 1 | 1952 |
 GECF Belgium | 1 | 1969 |
| Geddes And Grosset UK | 2 | 1988 - 2000 |
 Gefco Austria | 1 | 2018 |
| Gehlen Germany | 2 | 1957 - 1962 |
| Geiger-Verlag, Horb Germany | 3 | 2006 - 2014 |
| Gelderland Netherlands | 1 | 2009 |
| Gem Books USA | 1 | 1952 |
| Gemstone Publishing USA | 3 | 2015 - 2020 |
| Genealogisk Ungdom Sweden | 1 | 1983 |
| Genealogiska Föreningen Sweden | 57 | 1980 - 1998 |
| General Gramophone Publications Ltd UK | 3 | 1977 - 1989 |
| General Paperbacks Canada | 1 | 1989 |
| General Publishing Group, Inc. USA | 6 | 1995 - 1998 |
| Genesis Romania | 1 | 1998 |
| Genesis Publications UK | 20 | 1980 - 2022 |
| Genius Music USA | 1 | 2022 |
| GEO Italy | 1 | 1996 |
| Geoffrey Bles UK | 9 | 1928 - 1965 |
| Geoffrey Chapman Publishers UK | 1 | 1972 |
| Geoffrey Tulet & Associates UK | 1 | 1982 |
| Geographers' A-Z Map Co. UK | 1 | 1996 |
| Geographers' Map Co. UK | 2 | |
| Geographia UK | 2 | |
| Georg Bitter Verlag Germany | 1 | 1977 |
| Georg Müller Germany | 3 | 1913 - 1921 |
| Georg Olms Germany | 1 | 1976 |
| Georg Thieme Verlag Germany | 5 | 1967 - 1980 |
| Georg Westermann Verlag Germany | 1 | 1949 |
| George Allen UK | 1 | 1900 |
| George Allen & Sons UK | 1 | 1907 |
| George Allen & Unwin UK | 7 | 1952 - 1987 |
| George Allen And Unwin Australia | 1 | 1984 |
| George Allen And Unwin UK | 6 | 1943 - 1981 |
| George Allen And Unwin Ltd UK | 16 | 1966 - 1985 |
| George Bell And Sons UK | 2 | 1883 - 1897 |
| George Braziller USA | 2 | 1959 - 1981 |
| George G. Harrap & Company UK | 5 | 1917 - 1949 |
| George H. Doran Company USA | 1 | 1921 |
| George H. Harlan USA | 1 | 1983 |
| George H. LaBarre Galleries, Inc. USA | 2 | 1981 |
| George Harrap & Co. UK | 1 | 1919 |
| George N. Morang & Co. Canada | 2 | 1901 - 1903 |
| George Newnes Ltd UK | 11 | 1892 - 1964 |
| George Philip & Son UK | 4 | 1929 - 1999 |
| George Prior Publishers UK | 3 | 1977 |
| George R. Cockle Associates USA | 1 | 1978 |
| George Ronald UK | 1 | 1951 |
| George Routledge And Sons UK | 2 | 1879 - 1894 |
| George Turton Ltd UK | 6 | 1958 - 1959 |
| George W. May UK | 1 | 1924 |
| George Wittenborn, Inc. USA | 1 | 1967 |
| Georgia State University USA | 1 | 1980 |
| Gerald Duckworth And Co. Ltd UK | 4 | 1976 - 1978 |
| Gerald F. Vaughn USA | 1 | 1973 |
| Gerald G. Swan Ltd. UK | 3 | 1949 - 1953 |
| GeraMond Germany | 4 | 2003 - 2018 |
| Gérard Noël Fanéditions France | 1 | 1991 |
| Gerd Haffmans Bei Zweitausendeins Germany | 8 | 2002 - 2004 |
| Gerhard Kaiser Germany | 1 | 1984 |
| Gerhard Stalling Verlag, Oldenburg Germany | 3 | 1969 |
| Gerhard Stalling Verlag, Oldenburg / Berlin Germany | 1 | 1943 |
| Gerhard Stalling Verlag, Oldenburg Und Hamburg Germany | 2 | 1966 |
| Gerlach & Wiedling, Wien Austria | 1 | 1948 |
| Gerstenberg Verlag Germany | 3 | 2009 - 2012 |
| Gerth Medien Germany | 2 | 2008 - 2018 |
| Geschichtswerkstatt Neuhausen Germany | 1 | 2001 |
| Gesellschaft E.V., Postfach 429-D-4770 Soest Germany | 1 | 1985 |
| Gesellschaft Für Darstellende Und Angewandte Naturkunde Austria | 1 | 1968 |
| Gesellschaft Zur Vereinigung Des Weltchristentums Germany | 1 | 1973 |
| Gesundheitsverlag Bad Wörishofen Germany | 1 | 1933 |
| Get Happy Germany | 1 | 2005 |
| Gialli Dell'Ossessione Italy | 1 | 1961 |
| Giallo Selezione Italy | 1 | 1960 |
| Gibbs M. Smith USA | 1 | 1984 |
| Gibbs Smith USA | 1 | 2014 |
| Gibbs-Smith Publisher USA | 3 | 1994 - 2008 |
| Gibson Square International | 1 | 2002 |
| Gigamesh Spain | 1 | |
| Gilberton Company USA | 2 | 1949 - 1958 |
| Giletta . Nice-Matin France | 1 | 2012 |
| Gill & Macmillan UK | 1 | 2008 |
| Gill & Macmillan Ireland | 1 | 2014 |
| Gilla Böcker Sweden | 2 | 2010 - 2013 |
| Gilles Petard France | 1 | 1987 |
| GilleTt Brothers Of Walthamstow UK | 1 | |
| Gilletta France | 1 | 2016 |
| Gingko Press International | 1 | 2019 |
| Gingko Press USA | 1 | 2021 |
| Ginn And Company USA | 3 | 1905 - 1941 |
| Ginn And Company UK | 1 | 1964 |
| Gino Conte Italy | 1 | 1953 |
| Giors Publishing Italy | 1 | 1987 |
| Giovanelli Edizioni Italy | 1 | 2016 |
| Giramondo Australia | 4 | 2005 - 2017 |
| Girardet Germany | 2 | 1972 - 1973 |
| Girl:It Sweden | 1 | 2020 |
| Giunti Italy | 4 | 1998 - 2020 |
| Glänta Produktion Sweden | 1 | 2006 |
| Glasgow Museums UK | 1 | 2011 |
| Glasgow School Of Art UK | 1 | 1994 |
| Gleerups Sweden | 2 | 1963 - 1969 |
| Glénat France | 2 | 2013 - 2022 |
| Glenwood USA | 1 | 1973 |
| Glenwood Publishers USA | 1 | 1975 |
| Glitter UK | 2 | 1999 - 2004 |
| Global Publishing Limited UK | 2 | 2004 - 2008 |
| Globe Book Company USA | 1 | 1929 |
| Globe Pequot USA | 1 | 2004 |
| Globus Verlag G.m.b.H., Berlin Germany | 3 | 1940 |
 Glória Hungary | 1 | 2002 |
| Gloria Romania | 1 | 1992 |
| Gloucestershire C.C.C. UK | 1 | 1989 |
| Glowworm Press UK | 1 | 2020 |
| GM France | 3 | 2017 - 2018 |
| Gmeiner Germany | 14 | 2006 - 2024 |
| GMP Publishers Ltd. UK | 1 | 1986 |
| Gnome Press USA | 21 | 1949 - 1959 |
| Go Entertainment UK | 1 | 2015 |
| Goblinshead UK | 2 | 2002 - 2011 |
| Gold Label USA | 1 | 1929 |
| Gold Medal USA | 352 | 1950 - 1983 |