GSHS
- GS (disambiguation)
- GSH (disambiguation)
- Garden Spot High School
- Garner Magnet High School
- George Stephenson High School
- Gibson Southern High School
- Gladstone State High School
- Glenbard South High School
- Glenwood Springs High School
- Grand Saline High School
- Great Sankey High School
- Greenville Senior High School (Greenville, South Carolina)
- Gulf Shores High School
- Gyeonggi Science High School
- Steinbrenner High School