During the 1990s he was a member of prog band ICU with whom he released four albums. With his solo output so far being 2005's Auszeit, a guitar and flute album, and the latest release Goldstadt, a concept album about the destruction of the city of Pforzheim towards the end of the second world war which almost completely destroyed the city and resulted in the death of nearly a third of its population. The album features Glönkler on guitar, bass and keyboards, Ralf Großmann on vocals, Patrick Fiedler on drums, Eva-Maria Baumann on flute with Christoph Wieland adding a couple of guitar solos.