Green’s Dictionary of Slang

(Aus.) money.

1900		Sydney Sportsman (Surry Hills, NSW) 3 Oct. 1/4: At Punterville races, the pick of all places / For dropping the gonce, or for picking it up.
1905		Sun. Times (Perth) 3 Sept. 4/7: The men knew that to get the [...] gonce was as tough a proposition as tickling a drink out of hard-faced Kangaroo Kate at the shypoo ranch.
1907		‘A Cronk Camp’ Truth (Wellington) 19 Jan. 5: The nigger made a small pile of gonce out of the navvies, and the contractors supprted him in the extortion he practised.
1907		Truth (Wellington) 3 July 3: [headline] Gramaphone And Gonce.
1912		Bulletin (Sydney) 12 Dec. 25/4: No offence, Mister, [...]. But I don’t care about cheques. You see, I don’t know you from a crow. Can’t you cash it at the office, and give me the gonce.
1914		N.Z. Observer (Auckland) 21 Dec. 30/2: Took to backing prads and boose, / Just the same as me and you’s, / When we’ve got to gonce to lose.
1918		N.Z. Observer (Auckland) 9 Dec. 5/3: We made a muster then at once, / And gave old Bornikoff the gonse.
1924		C.J. Dennis ‘Nocturne’ in Rose of Spadgers 52: Wot kind a shikkered mug ’as gonce to spare.