His father first went to Hollywood in 1934 to work on the Max Reinhardt production of A Midsummer Night's Dream, and travelled to and from Vienna for the next several years.
During this time, George remained in Vienna: it was not until February 1938 that George arrived in the United States with his parents for the scoring of Robin Hood, and after the Anschluss in March and the emergency arrival of his older brother Ernst with his grandparents the family permanently remained in Los Angeles.
However, since Erich Korngold taught at the Academy throughout the early 1930s, it is thought possible that the young boy was permitted to be present in classes.
He also produced a series of 'landmark' recordings of his father's works, including the operas Die tote Stadt (for RCA) and Violanta (for CBS) and a disc of the First and Third String Quartets (for RCA; played by the Chilingirian Quartet).
In Hollywood, Korngold worked as a music editor on a number of high-profile films, including the big-budget The Fall of the Roman Empire (1964), Fedora (1978), The Fury (1978) and Outland (1981).