 Radio recordings have been made, including for the NDR, the SWR, deutschlandradio, the BBC and Radio France.A CD with orchestral songs by Gustav Mahler was released in 2010 with the Landesjugendorchester Baden-Württemberg under Christoph Wyneken.In the realm of music theatre, Gädker gave guest performances on the stages of Braunschweig, Leipzig, Frankfurt and Mannheim, where he was among others Count Almaviva "(The Marriage of Figaro)," Aeneas "(Dido and Aeneas)," Schneck "(Der Vogelhändler)," Notario "(Gianni Schicchi)" as well as in other roles in world premieres of the opera "Wasser" by Arnulf Herrmann and the chamber opera "Neumond" by Lucia Ronchetti.