Gnädinger erlernte den Beruf eines Schriftsetzers, bevor er in Zürich am Bühnenstudio seine Schauspielausbildung begann. In der Folge arbeitete er an verschiedenen Bühnen. Das letzte feste Engagement hatte er in Berlin an der Schaubühne. Er ist seit 1988 freischaffender Schauspieler. In seiner bisherigen Laufbahn wirkte er in 130 Theaterstücken und über 70 Filmen für Kino und Fernsehen mit.
2016
as Anton Sommer
2015
as Willi Keller
2013
as Louis Lauener
2012
as Kommissar Hunkeler
2011
as Komissär Hunkeler
2010
as Max Wanner
2009
as Kommissar Hunkeler
2008
as Komissär Hunkeler
2007
as Gregor Sonderegger
2005
as Robert Stamm
2005
as Komissär Hunkeler
2005
as Viktor Looser
2005
2004
as Komissär Hunkeler
2004
as Hermann Göring
2004
as Franz Engi
2002
as Maréchal François Joseph Lefebvre - duc de Dantzig
2002
as Adalbert Jentsch
2001
as Urs
2000
as Stephan Ernst
2000
1999
as Ruedi Egger
1996
1995
as Brugger
1994
as Police Chief
1993
as L'oncle / Onkel
1993
as Police Chief
1993
as Freddie
1992
as Roger Kessel
1990
as Berner
1990
as Manser
1990
as Truckdriver Ramser
1990
as Bingo
1989
as Leo Mangold
1989
as Büttel
1989
as 'Hirschen'-Wirt
1989
as Horstmann
1988
as Budenbesitzer
1988
as Emil Brandenberger
1987
as Herr Peterich
1987
as Lirchmair
1986
as Romeos Vater
1983
as Hans Sturzenegger
1981
as Franz Flueckiger
1979
1979
as Kostja
1979
as Taxifahrer
1979
as Kaltenegger
1979
1970
as Walter Howald
1970
as Schneider
1970
as Heinz Osburg
1970
as Alex Kerger
1968
as Die vier Brüder #2