Gachoire Girls High School is a county school in Lari Sub County, Kiambu County, The school has come along way since it was started in 1977, through self-help community effort as a single stream mixed High School with four classrooms, an office and two teachers’ houses. It is currently one of the largest in population girls boarding school in the county. Gachoire has continued to excel in academic performance in each exam year.

The idea to have a secondary school within Gachoire sub-location was conceived in the late 1950’s during land consolidation by a man who never attended any formal schools.

In 1974, the then area sub-chief late Samuel Wainaina Gichuhi invited a few people to a committee where he raised the agenda of building a high school as development for his area. The members agreed to sensitize the people and to check on all requirements such as registration, sponsorship, license and few units for teachers’ quarters.