There is more than one artist with this name, including:
1) The image in the header of this page is of Gass. A British rock band formed in May 1965 by Bobby Tench, Godfrey McLean, and Errol McLean;
2) Gass was a band that released the single "Dark" in 1997;
3) Gass a Belgian artist.

1) Gass was a British rock band formed in May 1965 by Bobby Tench, Godfrey McLean, and Errol McLean. The band fused melodies with soul, Latin influences, blues and progressive rock often employing complex rhythms[3] with an eclectic mix of other influences.
The band released their first album, "Juju" in 1970, which featured guitarist Peter Green.
In May 1971, Tench joined Jeff Beck Group and Gass disbanded. Godfrey McLean recorded with Brian Auger and The Oblivion Express.

2) Gass was a band that released the single "Dark" in 1997.

3) Gass was a Belgian artist. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.