It is Spann's only studio album as a leader, recorded when he was playing as a sideman with Dizzy Gillespie's quintet and Quincy Jones' big band.

[4] For this work Spann led a quintet formed by Julius Watkins (French horn), Tommy Flanagan (piano), Sam Jones (double bass) and two drummers sharing the two recording dates, Albert "Tootie" Heath and Louis Hayes.

[5] Alex Henderson of Allmusic regrets that this musician did not leave more recordings as a leader and considers that Gemini is "an excellent hard bop date" where "Spann gives 100 percent at both sessions", describing his style here bluesy and expressive as a guitarist but equally impressive when he picks up the flute[2] while Marc Myers, historian and contributing journalist of The Wall Street Journal believes that the album's producer, Orrin Keepnews, had great musical instincts for this recording it in 1960: "Listening to it today, the entire album is superbly constructed by Spann, and the merged sound of guitar, flute and horn is rich, thoughtful and mellifluous".

[6] For Richard Cook and Brian Morton at The Penguin Guide to Jazz "the curious contrast in the leader's guitar and flute styles is used quite effectively, with a smart rhythm section", although they criticize that in the final mix his guitar "sounds thin and hidden a lot of the way".

[3] The album cover is by Riverside Records designer Ken Deardoff and the main image is a black and white photograph by Lawrence N. Shustak,[5][2] showing a smiling Les Spann with a flute and a lit cigarette next to a Guild guitar model Stuart A-500.