There are multiple artists using the name "Gamma". 1) Gamma is a band formed by guitarist Ronnie Montrose back in the 70s, after his band Montrose released several LPs, including the classic Montrose/Montrose(Bad Motor Scooter, Rock The Nation). From Northern California, Gamma received relatively little airplay even though their music was very high-quality with stellar musicianship and songwriting.
2) Gamma is a UK Hip-Hop crew on the label Big Dada.
3) Gamma is a Chiptune musician. He/She/It/They have a 9 track album entitled "live" free to download on Kittenrock.co.uk