William A. Shine Great Neck South High School (commonly Great Neck South, GNSHS or South High School) is an American public four-year high school. It is located in Lake Success, New York, serving students in grades 9 through 12. However, GNSHS is officially listed in Great Neck. Great Neck South is one of three high schools in the Great Neck School District, which includes Great Neck North High School and Village School.