His first substantial publication related to early Hallstatt Iron Age decorated pots from the barrow cemetery and fortified settlement, which overlooked Sopron (Gallus 1934).
Gallus's five years in Melbourne were spent in various unskilled jobs, a common experience of many Central European intellectuals and professional people.
In 1963, Gallus became an Associate of Current Anthropology, in whose pages he was a frequent commentator on such various and varied topics as genetics, human migration, artefact typology, and symbolic systems.
In his Australian research, Gallus had two main themes; the Pleistocene spread of humankind and examination of material remains as evidence of population movements.
He was particularly interested in demonstrating his belief in a very early, Pleistocene occupation of Australia, through excavations first at Koonalda Cave on the Nullarbor Plain (Wright 1971) and secondly at Keilor on the terraces of the Maribyrnong River.