Gonzales was appointed to the District 1 seat by the board on Aug. 4, weeks after Naomi Narvaiz, who defeated Gonzales in a May election, resigned from the seat.
Gonzales was considered for the appointment at the board's special called meeting Aug. 4 along with John Joseph Roppolo and Sophia Carter Downing. Each candidate was interviewed by the board in a closed session during the meeting.
"My commitment to the district didn't stop after the election," Gonzales said. "It didn't turn out the way I wanted, but I was still here to help and assist in any way I could. Even tonight, if it hadn't turned out I still would have been on board with helping out the school district."
Gonzales was approved for the position with a 4-2 vote. Trustees Lupe Costilla and John Crowley appeared ready to cast their votes for Roppolo, but when Gonzales' nomination was read and he secured a majority of the votes, a second vote was not necessary.
Gonzales served on the committee that helped form last year's $77 million bond package, which was approved by voters in May. He has had two children graduate from San Marcos High School.
"I think [the district is] headed in the right direction and I want to be instrumental in continuing that," he said.
Gonzales said he plans to run for a full term in the May election.