This article is from the SF references in music List FAQ, by Rich Kulawiec rsk@gsp.org with numerous contributions by others.
Gillan:
The title song from "Future Shock" and, from "Glory Road", "On the Rocks"
describes a 1984-like world.
Ian Gillan Band:
"Clear Air Turbulence" is an album with some sf-related songs, such as
the title track (5000 'astral explorers' swarm out and return holplessly)
and "Five Moons" (describes the situation of people stranded somewhere
in space).
Girlschool:
All girl British heavy metal band, their LP "Nightmare at Maple Cross" is
pretty much a horror/fantasy type story.
Gowan, Larry:
See "Oceania" from "Gowan" (first LP) might refer to Oceana.
See also "Strange Animal", his second LP.
Graham, Mark:
The album "Natural Selections" contains several humorous songs on
various scientific topics, including "Big Bang Theory" (the story of
the universe in six minutes), "Working on the Food Chain", "I Can
See Your Aura and It's Ugly" and "Their Brains Were Small and They Died".
Great harmonica playing, too.
Grand Funk Railroad:
See "Time Machine" and "Into the Sun" from "On Time", and
"Life in Outer Space" from "What's Funk?"
Grateful Dead:
"Standing on the Moon" is a reflection by a singer who is standing on
the moon watching petty wars on earth; possibly SF-ish although it
seems to be more of a love song. In the post-apocalyptic vision/love song
"Morning Dew", two lovers decide to walk out in the morning dew
(despite the fallout) because "I guess it doesn't matter anyway".
Greenslade, David:
"The Pentateuch of the Cosmogony", a double album of electronic music.
A derelict alien spaceship enters our solar system. Their language is
decoded (details in the accompanying illustrated book); the music is
the story of their race. Also "Music from the Diskworld" based on and
using quotes from Terry Pratchett's Diskworld series. Most of the
album is "theme" tracks for one or another of the books several having
quotes from the text. And there are a couple of vocal pieces
"The Shades of old Ankh- Morpork" and "A Wizards Staff has a Knob on the End"
which relate to the series.
Guided By Voices:
Some of their songs have fairly suggestive titles such as "Hardcore
UFO's", "Alien Lanes" and "Saturn X Radio Report", but their lyrics
at their most understandable are fairly cryptic, and often just darn obscure.
 
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