Gibsonville, CaliforniaGibsonville is a former settlement in Sierra County, California, United States.GeographyGibsonville is west-northwest of Mount Fillmore.HistoryGibsonville was founded in 1850, named after James Gibson, who guided a group of miners into the area. Population reportedly peaked early at 2000 residents, declining to 700 in 1855 then to 200 around 1882. A post office opened in Gibsonville in 1855 and closed in 1910. The land beneath the Gibsonville townsite was reworked by gold miners in the 1930s. By 1964, Gibsonville was a "ghost town".