Glenbrook South High School, or GBS, is a public four-year high school located in Glenview, Illinois, a north suburb of Chicago, in the United States. It is part of Northfield Township High School District, which also includes Glenbrook North High School. Feeder schools that attend GBS are Attea, Springman, Field (Glenview portions), and Maple (Glenview portions). Wikipedia