John Peddubriwny, 62, of Camac Park, Bluebell, Dublin, pleaded guilty to possessing stolen property.
It followed an investigation when the 1987 medal, won by former Meath footballer Martin O'Connell, was taken with other items from his parents' home on November 17, 2020.
Dublin District Court heard he worked as a "gold scrapper" on Dublin's Francis Street.
Peddubriwny received a call from a man who told him he had "gold for sale", and they met on November 18.
He weighed and then bought the All-Ireland medal and other gold jewellery: an elderly woman's wedding band, a chain and a jubilee medal, worth about €1,000.
He paid €571 for them at a rate of €15 per gram and then supplied them to another gold trader for €18.36 a gram.
The other gold items were melted down.
But the second gold dealer became aware of media coverage of the theft and spared the All Ireland medal, which has been recovered.
Pleading for leniency, his barrister said his client was from England originally but has lived in Ireland for 13 years. As a result, he was not aware of the significance of the GAA medal.
He had no previous criminal convictions and had set up the business with his brother, who later died. The defence said the person who contacted him had claimed to be a friend of his brother.
Counsel asked the judge to credit Peddubriwny for his guilty plea, co-operation and admissions when interviewed at Kells Garda station.
The offence was caused by recklessness. Peddubriwny, a carer for his wife, is unlikely to come before the courts again and no longer works in the gold business, the defence said.
He also wished to visit family members in Australia and America during his retirement.
Peddubriwny was remorseful and saddened for the victim, Judge Treasa Kelly noted. She asked for a Probation Service assessment.
The case resumed after a pre-sentence report was provided to the court.
He received the Probation of Offenders Act, sparing him a criminal record as well as a sentence.