Gustav Adolf Lammers Heiberg (22 April 1875 – 1948) was a Norwegian barrister and politician for the Labour Party.
He was born in Kristiania as a son of barrister Anton Vilhelm Heiberg (1831–1885) and his wife Antonie Magdalene Fossum.
[6] Berge was a former Prime Minister, and his cabinet members Odd S. Klingenberg, Christian F. Michelet, Cornelius Middelthon, Johan H. Rye Holmboe, Anders Venger and Karl Wilhelm Wefring also stood for trial.
[7] During the German occupation of Norway, Heiberg was incarcerated at Grini as a "hostage", from 14 April 1942 to 22 October 1942.
[5] In 1945 Heiberg was named as chairman of the commission Undersøkelseskommisjonen av 1945 that scrutinized the actions of the Norwegian government in 1940.
[6] The other commission members were Arnold Holmboe, Ole Hallesby, Ernst Fredrik Eckhoff, Nils Nilsen Thune, Arne Bergsgård and Sverre Steen, and the secretary was Helge Sivertsen.