[3] Gadston began his career as a youth and amateur player for West Ham United, before moving to Third Division club Brentford,[3] for whom he failed to make a first team appearance and instead played for the reserves.
[4] His most prolific spell came with Exeter City, whom he joined in November 1969,[1] before moving to Aldershot in July 1972.
[8] After a brief loan spell with Hartlepool in February 1973, Gadston dropped back into non-League football with Wimbledon later that year.
[2] He subsequently served as general manager of Swanage Town & Herston and later returned to Brentford as Football in the Community Officer.
[9][10] He taught sport at Sunninghill Preparatory School in Dorchester until July 2014.