| Gateway High School | |
| Motto: | Graduation and Beyond |
| Established: | 1986 |
| Status: | Currently Operational |
| Type: | Public High School |
| Affiliation: | None |
| District: | Osceola County |
| Us Nces District Id: | 1201470 |
| Us Nces School Id: | 120147002476 |
| Grades: | 9-12 |
| Principal: | James Long |
| Enrollment: | 1,640 (2019-20)[1] |
| Ratio: | 19.52 |
| Teaching Staff: | 84.00 (FTE) |
| Gender: | Coed |
| Colors: | Black and silver [2] |
| Mascot: | Panthers |
| Campus Type: | Suburban |
| Streetaddress: | 93 Panther Paws Trail |
| City: | Kissimmee |
| State: | Florida |
| Zipcode: | 34744 |
| Country: | U.S. |
| Website: | GHS |
Gateway High School is located in Kissimmee, Florida. It is home to Osceola County's International Baccalaureate Program and is also the site for one of the largest Performing Arts Centers in the county, which houses the Thespian Society, known for its various productions and awards won at the Florida Thespian Competition.