Geoffrey Boycott and Dickie Bird were among the legendary names from the world of sport in Yorkshire who attended.
Labour MP for Batley and Spen Kim Leadbeater gave a speech during the service, as did broadcaster Simon McCoy.
Mr Gration, who died suddenly in June aged 71, lived in the city and Rev Canon Richard Carew, the vicar of St Edward the Confessor Church in Dringhouses, will lead the service.
The former Archbishop of York, Lord John Sentamu, will also preach during the service.
Hundreds of people lined up outside the Minster to attend the service, although not all could get in. Members of the public were invited to both the service itself, and also to line the cortege route outside the Minster and down Lendal.
Photographs taken by Simon Hulme.
The funeral of much-loved presenter Harry Gration took place at York Minster today, Pictured is his wife Helen and their two children Harrison and Harvey.
Harry Gration's widow Helen with sons Harrison (left) and Harvey (right) at a service of thanksgiving for the BBC presenter at York Minster in York
The family and loved-ones of Harry Gration gathered to say goodbye.
4. Yorkshire legend
The touching service was fittingly held at Yorkshire's grandest church on Yorkshire Day.
Former England cricket player Geoffrey Boycott arrives at a service of thanksgiving for BBC presenter Harry Gration at York Minster in York
Former cricket umpire Dickie Bird (left) and Lord John Sentamu arrive at a service of thanksgiving for BBC presenter Harry Gration at York Minster in York