G aye Farncombe is an Australian heiress to the real estate fortune created by her late father, Neilma Gantner. Her family's wealth is rooted in the property development company, the Gandel Group, which was co-founded by her father and her uncle, the prominent billionaire John Gandel. The Gandel Group became a major force in the Australian real estate market, particularly in the development and ownership of large shopping centers.

Upon her father's death, Gaye Farncombe and her family inherited his 50% stake in the vast property empire. The family's most significant asset is a half-share of the Chadstone Shopping Centre in Melbourne, the largest and most valuable shopping mall in the Southern Hemisphere. Her wealth is derived from her inherited stake in this massive and highly profitable real estate portfolio.