As explained in the Seattle P-I, the race between Gonzalez and his opponent will be decided in the August primary:
In Superior Court contests, if a candidate receives a majority in the Primary, then the candidate is automatically elected. The office does not go onto the general election ballot. If no candidate wins a majority, the top two face off in November.
In two King County Superior Court races, just two candidates are running — meaning August 7 will decide who sits on the bench.