G2 was a science fiction fanzine by Joe Gibson and Robbie Gibson.
G2 was released in the 1960s in El Sobrante, California, U.S.A. The first issue was published June 1961. At least 50 issues were released by the time the last issue, Vol. 6 #1, appeared in January 1967.
Joe Gibson, originally from Albuquerque, New Mexico, was a science fiction writer who was writing for pulp magazines such as Thrilling Wonder Stories, Amazing Stories, Galaxy, and Science Fiction Quarterly during the 1940s and 1950s. He had begun contributing to fanzines, such as Spectra by Arthur Louis Joquel, in the 1940s, and Inside in the 1950s. In 1955, he and Roberta Collins married but it wasn't till ten years later that they would decide to do a fanzine together.
Along with G2, he also released the fanzine, The Damned Patrol, organized for SF fans who were also interested in aviation. John Berry, Terry Jeeves, and Beryl Mercer were his co-editors for five issues of this U.S.A. - UK joint release.
Joe Gibson was awarded a Retro Hugo for best fan artist for 1946 in 1996.