Hi Chris,
There were three George Ferguson as convicts in VDL who had received their pardons by 1844 meaning they would have been listed as free if being married to Agnes. None of their conduct records mention their normal occupations. But looking at their descriptions, George from the Caledonia(1820) is listed as baker aged 17, George from Katherine Stewart Forbes(1832) is a boy aged 15, George from Mangles(1835) is labourer aged 20,
George from Mangles got permission to marry Rachel Lewis but she married in 1842 to Stephen Parkhouse, George from Caledonia married Agnes and was listed as baker over 21 years old and George from KSF I can find nothing either marriage or death.
Looking through Trove newspapers, I found a death of baker's brother Alexander
http://nla.gov.au/nla.news-article67114445
Also found two elderly female servants who worked at his home who died in their early sixties.
There was a George Ferguson in NSW 1817 saying he was moving to the Derwent.
There was also a George Ferguson as a cashier at a bank in Hobart in 1839 who later went to Bathurst in NSW when they started a new bank there.
Hope some of this helps.