Gill College is a South African high school in Somerset East. It was founded in 1869 as a university.
The school's namesake, Dr. William Gill, died in 1863 and left an estate equivalent to $23,000 US for the establishment of a college of higher education. Gill College was officially opened on March 18, 1869. The architecture was based on that of the University of Glasgow.
In 1903, a change in educational regulations caused Gill College to become a high school. The high school was coeducational before 1928 and again after 1965; between those dates it was a boys' school.