After completion of his academic qualification, as a beginning of his professional career, Gavin co-founded an organization Plump Jack Associates L.P along with his family friend Gordon Getty. Later the business grew to an enterprise with more than 700 employees.
Newsom’s political experience started as he started volunteering for Willie Brown’s successful campaign for mayor. Moreover, he also hosted a private fundraiser at his PlumpJack Café. He was also appointed by Brown as a member of Traffic Commission and hired as San Francisco Board of Supervision by Kevin Shelley, where he served as the youngest member and the only heterosexual Caucasian male as well as an elected president of the commission.
Newsom is also a book writer, his first book is Citizenville. The theme of the book tells "How to Take the Town Square Digital". He also published Reinvent Government which discusses the Gov 2.0 movement that is taking place across the United States.
Besides writing, Gavin also began working with the Center for Information Technology Research in the Interest of Society at the University of California.
Heading towards Newsom's personal life, he was in a relation with Ruby Rippey-Tourk, unfortunately, their relation didn't last for long. Gavin later connected with actress Jennifer Siebel. After dating couples of the year, they married in Stevensville, Montana. The couple gave birth to four children, Montana Tessa, Hunter, Brooklynn, and Dutch.
Newsom earns a good amount of money in his career recently he moved to Kentfield, California along with his family and bought a house for $2.145 million, the house is located with the heart melting view of Mount Tamalpais and covers 1.38 acres. His current estimated net worth is $10 million.