Gandalf were based in New York in the mid to late 1960's, originally as The Rahgoos. They changed their name prior to recording their LP at the suggestion of the album producers. The name though, taken from Tolkein's Hobbit, was selected by the band. The group had split up by the time the album was released.
Additions, corrections and comments are welcome
Gandalf - Albums
Gandalf, Gandalf, 1969
Gandalf 2, Gandalf, 2007
Gandalf - Singles
Golden Earrings / Never Too Far, Gandalf, 1969, Capitol P-2400
Various artist compilations that include tracks by Gandalf
4 Is A Four Letter Word, Various Artists, 196?
Rock A Delics, Various Artists, 197?
Hippydip, Various Artists, 1997
Electric Psychedelic Sitar Headswirlers, Vol. 9, Various Artists, 199?
Psychedelic Frequencies, Various Artists, 199?
Rare Trax 32: Eight Miles High, Various Artists, 2004
Ah Feel Like Ahcid!: 24 American Psychedelic Artefacts From The EMI Vaults, Various Artists, 2007