Highest salary at Gurnee Sd 56 in year 2018 was $129,525. Number of employees at Gurnee Sd 56 in year 2018 was 116. Average annual salary was $24,733 and median salary was $19,039. Gurnee Sd 56 average salary is 47 percent lower than USA average and median salary is 56 percent lower than USA median salary.