There are at least two artists operating under this name

1. Matt G - a folk and classical music producer from the UK, who is part of the independent record label, Joy Lane Music.

2. Matt G (also known as Matty G) - a dubstep music producer from California, USA.

3. Matt G (Matt G.) - Matías Giunta. Born July 21st 1987 in Buenos Aires, Argentina.
Progressive House producer with few releases on lablels like Mistique Music and Sudam.

http://www.sudamrecordings.com/artist.php?id=15
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