Gordon began his journalistic career as a teenager, working as a copyboy for The Daily Telegraph when he was 16. He began working at The Sun News-Pictorial in 1949 as a general reporter. In 1950, at the age of 24, he was sent abroad to cover the Korean War from the front-line. In addition to his own newspaper, his war reports were published in the Adelaide Advertiser, The West Australian and The Courier-Mail. Shocked by the edits made to his reports by the United States' censorship teams, he developed a system of flying to Japan when he had a particularly good story, and dictating his report to a friend who would take a copy to the AAP-Reuters office in Tokyo for direct transmission to Australia; this avoided the reports being censored. In 1968, he was appointed Editor of The Sun News-Pictorial. He used his newspaper to head a campaign titled 'Declare War on 1034' to reduce car-related fatalities; the number is a reference to the number of road deaths in Victoria in 1969. The campaign was successful and in 1970 the state government introduced a mandatory seatbelt law requiring car users to wear seatbelts; this was the first such law in the world. He was Chairman of the Australian Associated Press in the 1980s.
Olympic Games
As a journalist, he covered every Olympic Games between 1952 and 2012: his first Olympics being the Helsinki Games, and his last the London Games. In 1992, he was appointed the official historian of the Australian Olympic Committee. He wrote a history of Australia's participation in the Olympics. It was titled Australia and the Olympic Games and it was published in 1994. In 2003, he authored The Time of Our Lives: Inside the Sydney Olympics : Australia and the Olympic Games 1994–2002 and in 2014 From Athens With Pride: The Official History of the Australian Olympic Movement, 1894 to 2014. Gordon played a major role in the naming of streets around the 1956 Melbourne and 2000 Sydney Olympic precincts. The streets were named to honour significant Olympic athletes.
Later life
He was a member of the Australian Football Hall of Fame selection committee from 1996 to 2008. He was hospitalised two weeks before his death because of respiratory issues. He died in January 2015, aged 89.
Personal life
Gordon married Dorothy Scott in 1951. Together, they had three children; Sally, Michael and John, who all followed Harry into the media. He remarried in 1993 to Joy Milner. He is survived by his three children, seven grandchildren and second wife. He was a supporter of Hawthorn Football Club. He wrote a history of the Aussie rules club which was published in 1990.