Ralf Gauck is supported by the following brands:

Franz Bassguitars Sirius Ralf Gauck Signature Fretless Bass: www.franz-bassguitars.com 

Rheingold-Music cables, pickup & preamp: www.rheingold-music.de

Gallistrings strings: www.gallistrings.com

ART Case Artur Benedykt cases: www.benedykt-art-case.com

Lehle volume pedal: www.lehle.com

G7th capos: www.g7th.com