Bishop Gatimu Ngandu Girls High School, popularly known as BG or BeeGee, was founded in 1960 by the late Bishop Caesar Gatimu in Ngandu area of Mathira Constituency in Nyeri County, Kenya. It was first named "Ngandu Girls' High School" from the area where it was situated. The name was later changed to honour its founder, The Right Reverend Caesar Gatimu. It was originally run by the Comboni mission.