Born April 18, 1945, Don grew up on a small farm outside of Gilroy and has been a lifelong resident of Santa Clara County. He attended local schools and earned his degree in Law Enforcement. Supervisor Gage began public service in 1981 when he was elected to the Gilroy City Council, where he was well known for his support of law enforcement and youth programs. He served on the Council until 1991 when he was elected Gilroy's Mayor. He was elected to the Board on March 18, 1997 and represents District One, which has a population of over 330,000 and encompasses 70 percent of the County's land area. It includes Almaden Valley, Santa Teresa, Blossom Valley, Gilroy, Los Gatos, Morgan Hill, San Martin, as well as the Mt. Hamilton Range and the Santa Cruz Mountains.