In an extraordinary move, the commissioner heading Queensland's CFMEU inquiry Stuart Wood called a media conference to publicly question M1 Traffic Control's new operation on the Gold Coast.
Senior counsel assisting Patrick Wheelahan linked the Queensland operation to CFMEU corruption exposed in Victoria in barrister Geoffrey Watson's "Rotting from the Top" report.
The Queensland operation's corporate structure was similar to Victoria's M Group traffic control company, which allegedly had links with Gatto, Mr Wheelahan said.
However, M1 Queensland director Jordan Paragalli rejected the claims, telling AAP that he was the sole operator and had "absolutely nothing to do" with Gatto or Victorian corruption allegations.
"I have been here for 15 days," he said, with nearby businesses confirming his business signs were posted just two days ago.
"This is a separate venture, and yeah, while it's under the same banner, it's a completely separate venture with no CFMEU link to it or anything like that."
The Queensland inquiry officials on Wednesday called a media conference outside a Gold Coast address shared by M1 Traffic Control QLD to appeal for information.
It marked the first time since the Fitzgerald inquiry into political corruption in the late 1980s that a commissioner held a public plea in Queensland while a legal probe was under way.
"We're charged with carrying out an investigation, and the terms of reference are very broad," Mr Wheelahan said.
"We're supported by the Queensland police, and it's appropriate that we do this so that we can garner the support of the public, so that they can come forward with more information."
Gatto was first linked to the M Group by Mr Watson's report.
It identified "inexplicable favouritism" towards the group by the CFMEU, an arrangement that generated tens of millions of dollars.
Mr Wheelahan said it would be "remiss" for the inquiry not to explore potential links to Gatto as construction began before the 2032 Olympics in Brisbane.
"The money pot is clearly now going to be in Queensland in the build-up to the Olympics - I think $130 billion is going to be spent," he said.
"Queensland does not want to end up like Victoria."
Mr Wheelahan said M1 Traffic Control Group's corporate structure was similar to the company's Victorian set-up, naming Jordan David Paragalli as the Queensland company director.
The Watson report found that father Tony Paragalli was a frontman for Gatto, nominated as a "dummy director" for at least 28 companies in areas including security services, transport, hotels and telecommunications.
Jordan Paragalli confirmed Tony Paragalli was his father, but labelled the CFMEU inquiry's allegations false and disrespectful.
He claimed the CFMEU inquiry had made "absolutely no attempt" to contact him before airing the allegations.
"This is going to cause detrimental damage to my business and the associated businesses as well that are on the same block because they would have been advertised in the background," he said.
"It is a separate company. It is run by myself ... so I find it incredibly disrespectful. It could not be any more false.
"If I have to move back to Melbourne, because this is going to harm my brand, who's going to foot the bill - my rent, and all that stuff like that?"
AAP attempted to contact Tony Paragalli for comment.
Queensland's CFMEU told AAP it had no connection to the M1 group.
Mr Wood said no findings had been made against the M1 group's Queensland arm, which was entitled to procedural fairness.
The commissioner could not rule out further public appeals as the inquiry continued, with a final report due in July.
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