Gjertruds sigøynerorkester (Gjertrud’s Gypsy Orchestra, GSO) was founded in 1989 and has specialised in eastern European Gypsy music from Russia, Romania and Hungary, collaborating with the best musicians in Budapest.

In recent years, the group has also collaborated with musicians and composers in cross over projects ranging from Norwegian folk music to contemporary improvisational music. GSO has toured extensively in Norway and abroad and released several CDs. The group receives financial support from Arts Council Norway.