On coming to Australia, he initially lived at Warwick in Queensland, joining two of his brothers at their property, Ullathorne.

He married Irish-born Annie McBride, to whom he became engaged in Ireland, in Sydney in January 1869, traveling from Queensland to meet the boat she arrived on.

[2] Wilson's sister Catherine was married to Queensland parliamentarian Thomas Johnson[3] and his niece Emily Maud Wilson, daughter of his younger brother Wesley,[4] was married to Sir Robin Edward Dysart Grey, 6th Baronet[5] Grey of Fallodon.

"[11] He and Annie were parents to six children, including Sir Thomas George Wilson (1876 - 1958), an obstetrician, gynaecologist and academic.

[16] After his time in politics, Wilson continued to work as a successful auctioneer and financial agent, and traveled widely.