After graduating in 1982 from Schiller-Gymnasium in Berlin-Charlottenburg, Gaebler studied Transportation Engineering at Technische Universität Berlin, specializing in Planning and Operations.
[2] Since 2003, Gaebler has been running a restaurant at Oranienplatz in Berlin-Kreuzberg, in partnership with Robert Krainovic.
[2] From 1992 to 1995, Gaebler served as a citizen deputy in the Committee for Economics and Real Estate of the Wilmersdorf District Assembly.
In the House of Representatives, he was also a member of the Council of Elders and the Committee for Urban Development and Transportation.
[8] In the 2011 election, he couldn't retain his constituency seat and eventually left the House of Representatives.