Gilbert George Dalziel was born in St. Pancras, London, on 25 June 1853, the son of engraver and publisher Edward Dalziel of the Dalziel Brothers. He learned wood-engraving in the family business, studied art at South Kensington and the Slade School of Art, and worked on the family's comic papers, starting on Fun, then running Judy after his father acquired it in 1872. Judy was edited by C. H. Ross, who had created the character Ally Sloper for it. In 1973 Dalziel published the first of a series of one-off spin-off books, Ally Sloper: A Moral Lesson, and then in 1884 a regular weekly, Ally Sloper's Half Holiday. He bought out Judy from his father in 1888, but was forced to sell it on some time after 1891.
He died in Hampstead in the second quarter of 1930.
- Nicholas Hiley, "Showing politics to the people: cartoons, comics and satirical prints", in Richard Howells and Robert William Matson (eds.), Using Visual Evidence, McGraw-Hill International, 2009, pp. 30-31
- Anthony Burton, "Dalziel family (per. 1840–1905)", Oxford Dictionary of National Biography, Oxford University Press, 2004, accessed 11 May 2013
- Dalziel, Edward, Dictionary of National Biography, Second Supplement, Vol. 1, p. 463, 1912