Gateway High School (GHS) serves the residents of Monroeville and Pitcairn, Pennsylvania. It is part of the Gateway School District and serves grades 9 through 12.
Gateway High School was built in 1958 and dedicated on November 15, 1959.
Gateway High School is a member of the Pennsylvania Interscholastic Athletic Association (PIAA) and the Western Pennsylvania Interscholastic Athletic League (WPIAL), District 7. The mascot of the school district is the Gateway Gator, a stylized alligator.