Appointed Assistant Director of Music at the Cathedral in September 2000, he worked closely with Andrew Nethsingha and then Robert Sharpe. During this time, he appeared as organist with the Cathedral Choir in numerous live broadcasts for BBC radio and television as well as on eight CD recordings on the Regent, Lammas and Priory labels.
After his early musical education in his hometown of Bangor, Northern Ireland, Christopher became Assistant Organist at St George's Parish Church, Belfast. At the age of 18 he moved to England to take up the organ scholarship at Pembroke College, Cambridge, where he read music. A Fellow of the Royal College of Organists, he studied the organ with David Sanger and Nicolas Kynaston at Cambridge. He was subsequently taught by Margaret Phillips at the Royal College of Music, where he was a post-graduate student and a prize-winner. During this time he also held the organ scholarship at Guildford Cathedral, working with Stephen Farr and Geoffrey Morgan.
Under Christopher's direction, Truro Cathedral Choir's recent CD recordings have attracted praise from critics in the international classical press: “Inspirational singing from one of the top cathedral choirs in the land” (Organists' Review); “The singing of the choir, set in the wonderful acoustic of Truro Cathedral, is beyond praise” (MusicWeb International); “They have a fresh, unforced sound and encompass with ease the bigger eight-part writing and unexpected harmonic progressions. It's noticeable that the solo voices include five different boy choristers of equal accomplishment – a tribute to Gray's expert training.” (Gramophone). Following on from single-composer discs of music by Benjamin Britten and Philip Stopford, the latest CD features music composed for Christopher Gray and Truro Cathedral Choir in the past three years by composers including Paul Drayton, Graham Fitkin, James MacMillan, Russell Pascoe and Julian Philips.