皮爾斯出生於塔斯馬尼亞州溫亞德(英语:Wynyard, Tasmania),他的家庭自1850年代以來一直在姐妹溪(英语:Sisters Creek, Tasmania)地區生活和耕作[3]。他在軍隊服役20年,並曾在東帝汶駐紮過一段時間[4]。後來他成為澳洲退伍軍人協會(英语:Returned and Services League of Australia)溫亞德分部的主席。在進入政界之前,皮爾斯在拉波尼亞(英语:Lapoinya)養殖肉牛。他是位於溫亞德的Yolla生產者合作協會的副主席[3]。
^ 4.04.1Remembering a fallen love. The Advocate. 18 April 2017 [1 June 2019]. (原始内容于2022-05-28).
^'Ordinary bloke' Gavin Pearce secured Liberal preselection for federal election. The Advocate. 14 October 2018 [1 June 2019]. (原始内容于2022-05-28).
^Braddon (Key Seat). ABC News. [1 June 2019]. (原始内容于2022-10-29).
^Labor-held Braddon tipped to fall to Liberal Gavin Pearce. The Australian. 1 May 2019 [1 June 2019].
^Massola, James. Who's who in the Liberals' left, right and centre factions?. The Sydney Morning Herald. Fairfax Media. [1 February 2022]. (原始内容于2021-03-22).
^Gavin Pearce claims Braddon victory for Liberal on platform of health funding and jobs creation. The Advocate. 19 May 2019 [1 June 2019]. (原始内容于2021-12-19).