Green’s Dictionary of Slang

(Aus.) The Riverina equivalent of the bogan n. (1)

1993		Aus. Word Map 🌐 gullie unsophisticated, flanno wearing, lower socioeconomic status, - similar to bogan or westie: That man is such a gullie!
2011		Madrigal Communications: Living east of Boganville? 19 June 🌐 [T]he Riverina has the gullie; Victoria has the Scozzer and Melbourne the mocca.