And on Sunday, he will celebrate his new role by meeting his fans at a special event in the Fruitmarket.
A lucky few will get the chance to meet their hero in person and hear first hand about his memories of London 2012, his plans for Glasgow 2014 and his passion for sport.
The event will also include a performance from official Games mascot Clyde and his dancing crew.
Games organisers hope Tom's appearance will ensure as many young people as possible will get involved in the Games before ticket sales close on Monday September 16.
Tom said: "I am really looking forward to seeing Glasgow and being a part of the countdown to the Commonwealth Games.
"I have great memories of winning gold in Delhi so I am totally focused on training and holding onto my title.
"In April, I experienced the enthusiasm of Scottish crowds when I won gold at the Royal Commonwealth Pool in Edinburgh, which is the same pool for the Commonwealth Games next year.
"I can't wait to be back there."
David Grevemberg, chief executive of Glasgow 2014, said: "Tom is the perfect ambassador to inspire young people about sport and help us get everyone involved in the UK's next major sporting celebration."
Tom started diving at the age of only seven and represented Britain in the 2008 Olympics.
He won two gold medals for England at the Delhi 2010 Commonwealth Games.
Tom also won bronze medal for Great Britain in the 10m individual event at London 2012.
Entry to the Fruitmarket event is on a first come first served basis. See glasgow 2014.com/tominglasgow for details.