There are mutliple artists with this name:
1) Gut is a German pornogrind band, credited as being the fathers of this genre. After several years of inactivity, they made a comeback in 2006, with the album "Cumback".
2) Gut were a short lived Austin, TX. Noise Rock band from the early 90's.
3) Gut are a German Jazz band from Dusseldorf.