The Gateway Athletic Conference is a Missouri State High School Activities Association recognized high school extracurricular league which includes sixteen schools located in the suburbs of St. Louis. The conference is divided into three divisions based on enrollment. The North division includes schools with smaller enrollment, the Central division for medium enrollment schools, and the South division for larger enrollment schools. Schools in the conference are located in St. Charles, Lincoln, Warren and Franklin counties in Missouri
| School | Team Name | Colors | Town | County | Enrollment (2022–23)[1] | Football* | Basketball* | BoysSwim/Dive* | GirlsSwim/Dive* | |
|---|---|---|---|---|---|---|---|---|---|---|
| North Point High School | Grizzlies | Wentzville | St. Charles | 1081 | Class 4 | Class 5 | GAC North-CentralClass 1 | |||
| Orchard Farm High School | Eagles | St. Charles | St. Charles | 633 | Class 3 | Class 4 | N/A | N/A | ||
| St. Charles High School | Pirates | St. Charles | St. Charles | 822 | Class 4 | Class 4 | N/A | |||
| St. Charles West High School | Warriors | St. Charles | St. Charles | 634 | Class 3 | Class 4 | N/A | |||
| Warrenton High School | Warriors | Warrenton | Warren | 1010 | Class 4 | Class 5 | N/A | N/A | ||
| Winfield High School | Warriors | Winfield | Lincoln | 512 | Class 4 | Class 4 | N/A | N/A |
| School | Team Name | Colors | Town | County | Enrollment (2022–23)[2] | Football* | Basketball* | BoysSwim/Dive* | GirlsSwim/Dive* | |
|---|---|---|---|---|---|---|---|---|---|---|
| Fort Zumwalt East High School | Lions | St. Peters | St. Charles | 1,235 | Class 4 | Class 5 | GAC North-CentralClass 1 | |||
| Fort Zumwalt North High School | Panthers | O'Fallon | St. Charles | 1,503 | Class 5 | Class 6 | GAC North-CentralClass 1 | |||
| Fort Zumwalt South High School | Bulldogs | St. Peters | St. Charles | 1,339 | Class 5 | Class 5 | GAC North-CentralClass 1 | |||
| Holt High School | Indians | Wentzville | St. Charles | 1,287 | Class 5 | Class 5 | GAC North-CentralClass 1 | |||
| Liberty (Wentzville) High School | Eagles | Lake St. Louis | St. Charles | 1,596 | Class 5 | Class 6 | GAC SouthClass 1 | |||
| Washington High School | Blue Jays | Washington | Franklin | 1,329 | Class 5 | Class 5 | GAC North-CentralClass 1 |
| School | Team Name | Colors | Town | County | Enrollment (2022–23)[3] | Football* | Basketball* | BoysSwim/Dive* | GirlsSwim/Dive* | |
|---|---|---|---|---|---|---|---|---|---|---|
| Francis Howell High School | Vikings | Weldon Spring | St. Charles | 1,838 | Class 5 | Class 6 | GAC SouthClass 2 | |||
| Francis Howell Central High School | Spartans | Cottleville | St. Charles | 1,808 | Class 5 | Class 6 | GAC SouthClass 2 | |||
| Francis Howell North High School | Knights | St. Peters | St. Charles | 1,686 | Class 5 | Class 6 | GAC SouthClass 1 | |||
| Fort Zumwalt West High School | Jaguars | O'Fallon | St. Charles | 1,784 | Class 5 | Class 6 | GAC SouthClass 1 | |||
| Timberland High School | Wolves | Wentzville | St. Charles | 1,677 | Class 5 | Class 6 | GAC SouthClass 1 | |||
| Troy Buchanan High School | Trojans | Troy | Lincoln | 2,200 | Class 6 | Class 6 | N/A | N/A |
*The class in which a school competes depends on the size of the school, which may be affected by co-op teams with nearby schools, and the particular sport or activity. Most activities (for example, baseball, softball, track, cross country) compete in four classes, but basketball and football competes in six. Swimming & Diving compete in two classes.[4]