Gayle is an arts and law graduate from the University of Adelaide. Gayle spent many years working for the NSW Attorney General’s Department before moving into the Attorney General’s Ministerial Office in 1998, and then the NSW Police Minister’s Office in 2000. Following this time in state government, Gayle worked as some Director in several NSW councils, primarily looking after service delivery and assets. She developed and delivered a number of waste management contracts on behalf of councils, as well as managing environment and regulatory departments, including rangers and compliance officers. After three years of being a stay-at-home mum, Gayle returned to work in 2012 at Visy. In November 2016, Gayle joined WMAA as Chief Executive Officer.