A former station in the Muswell Hill area, which was between Highgate Station and Muswell Hill Station. It was operated by the Muswell Hill Railway and opened 2 August 1902 on the existing line from Highgate to Alexandra Palace.
There was an intent during the interwar period to amalgamate the line with the Northern Line, but World War II intervened after only part of the works had been carried out, and Cranley Gardens (along with the rest of the line) was closed to passenger services on 3 July 1954.
Nothing remains of the station today and its site is now occupied by housing and a school.
More information on the Wikipedia page [1], and Disused Stations page [2]. A video here.