Hi Sue, thank you so much for your contributions. I knew about their journey out to Australia but not that they had a daughter.
If anyone would like to explore the extraordinary wartime career of Captain Robert Gee VC further then my source is A Tiger and A Fusilier, by Derek Seaton, privately published in Leicester in 2001. Rather surprisingly, there doesn't seem to be another biography. It's evident that Seaton had the help of Gee's relatives.