The screenplay is by David Williamson and original music was provided by Australian composer Brian May (who had also scored Mad Max) however the most striking feature of the soundtrack was the use of excerpts from Oxygene by French electronic music pioneer Jean-Michel Jarre. Quiet or sombre moments at Gallipoli, and the closing credits, feature the Adagio in G minor by Tomaso Albinoni.

(from Wikipedia about the film Gallipoli)

Soundtrack listing from Gallipoli

Wolfgang