From 1983, Lederer studied film and television recording at the Academy of Dramatic Art, University of Zagreb from where he graduated in 1989.

[2] In 1986, Lederer started studying archeology at the Faculty of Humanities and Social Sciences, University of Zagreb, and in 1989 he began postgraduate education at Inter-University Centre in Dubrovnik.

During his studies, with colleague Mojmír Konič, he produced 35 mm animated film Muybridge and comp.

[2] As a cinematographer, in 1987, he filmed for TV Zagreb (now Croatian Radiotelevision) documentaries "Udruženje samaca" and "Badanj".

Besides his regular work as cameraman and screenwriter, in cooperation with Dražzen Šimić since 1989 to 1990, he has conducted a series of independent clips about archaeology, history and travels.

Vlasta,[7][8] wrote a letter published in the Croatian daily newspaper Vjesnik on 14 August 1991:I hereby announce publicly that my son Gordan Lederer was treacherously murdered on 9th August 1991, by a mercenary gang of Chetniks while holding a camera in his hand, and that, thanks to the Chetnik collaborator, General Rašeta, he was denied any chance of survival.In 1999, Milan Zorić was convicted in absentia at the County Court in Sisak for the murder of Lederer.