Education
Gillett was educated at Wellingborough Grammar School in Wellingborough, Northamptonshir (see Mr Wrenn"s School by Graham & David Tall, Clocktower Publications, Kenilworth, 2013) est He studied for a Bachelor and an Master of Philosophy at Leeds University.
Career
From 1988 to 1999, he was Principal of Trinity College, Bristol, an Anglican theological college. From 1999 to 2008, he was the Bishop of Bolton, a suffragan bishop in the Diocese of Manchester. Since 2008, he has been an honorary assistant bishop and Diocesan Interfaith Adviser in the Diocese of Norwich.
From 1966 to 1968, he undertook study and training for ordination at Oak Hill College, an evangelical theological college in London.
He began his ecclesiastical career with a Curacy in Watford. From 1971 he was Northern Travelling Secretary of Pathfinders and the Church Youth Fellowships Association CYFA, an organization that supports Christian teenagers.
After a spell as Lecturer and first Director of Extension Studies at Street John"s College, Nottingham he became one of the leaders at the Christian Renewal Centre in Northern Ireland working for reconciliation in Northern Ireland at the height of the troubles in the late 1970s/early "80s. He then served an Incumbency at Lewsey in Luton.
He was appointed Principal of Trinity College, Bristol in 1988.
Eleven years later he was elevated to the Suffragan Bishopric of Bolton. His main specialisms are in the area of ministerial training, Old Testament studies,spirituality and interfaith relations. A keen photographer and gardener,he retired in 2008.
He then became an honorary assistant. bishop and Interfaith Adviser in the Diocese of Norwich.