Mugoiri Girls High School in Murang'a County was started in 1938 as a primary school. Later, between 1940 and 1956, the school was turned into an intermediate school by the Consolata Sisters.
The late Sr Zaveria Pasqualini, a Consolata missionary, enrolled the first 25 girls, and by late 1956, the student population had reached 150, with most pursuing teaching courses.
Then, the school which is nicknamed 'Muggz', was called Gatiiguru (which means 'hill' in Kikuyu).