The average engineer salary at Gilroy was $171,423 , which is 10 percent lower than the average salary for this job in California, but 79 percent higher than the national average for this job . Engineer salaries at Gilroy typically range from $151,456 to $193,910 (25th to 75th percentile). The highest reported engineer salary was $203,893. There are 5 employees at Gilroy with the job title engineer.