If California ever elects a pro heterosexual marriage governor and he or she decides to take this court case back to the SCOTUS... they can. It was ruled that an individual cannot sue on behalf of a State. CS I know but that was the decision.
“It was ruled that an individual cannot sue on behalf of a State.”
I’m not a lawyer, but the ruling also seemed to imply that no citizen has standing to sue the state to enforce properly enacted laws.