I've got a great quantity of information on English Ironsides, but my Scottish information is less complete.
You don't say much about George's marriage. I only have one matching 1873 marriage, with no precise date: George Ironside to Elizabeth Sinclair Morton, at Hutchesontown (Lanarkshire). I've got one child of this marriage - Elizabeth Jane, born 15 July 1874.
I hadn't identified this George with any specific birth, but if your information is correct then he is the son of William and Jane Scott who married 31 July 1834 at Fyvie, Aberdeenshire (also recorded at Inverurie on 19 July). I only have two children of this marriage: Elizabeth, born 7 March 1835 at Fyvie, and John, bp 9 Match 1843 at Chapel of Garioch.
In my database I have identified this William, perhaps incorrectly, as the William who was born 30 March 1811 at Fyvie to James Ironside and Margaret Cruickshank. I don't have Isabella Wright on my database.
Thanks for the information and any more that you can supply!