Brisbane's Gabba was awarded the AFL's showpiece event on Wednesday, which league chief executive GIllon McLachlan announced from resort quarantine on the Gold Coast.

Deputy Premier Steven Miles will not reveal details of the deal, in which the state will cover security and entertainment at the event, saying they're commercial in confidence.

He says economic modelling shows Queensland will enjoy a much greater return than the money it contributes to hosting the decider.

"All Queenslanders want to make sure that we do a really good job of this," he said.

"We're custodians of a very, very special day for Victorians and we want to make sure that we do a really good job, that we take care of it for them."

Treasurer Cameron Dick has said the event is expected to bring a windfall of $17 million and create 80 jobs.

But Opposition Leader Deb Frecklington says taxpayers deserve to know the exact cost of hosting the grand final given the state is suffering an economic slump.

Queensland's economy contracted by 5.9 per cent, which was less than NSW, Victoria and Tasmania, in the June quarter and the unemployment rate rose to 8.8 per cent in July.

"Of course I support the AFL and you know 'go the Brissy Lions' but at the end of the day Queenslanders deserve to know a couple of things: they deserve to know how much did it cost taxpayers?" Ms Frecklington said.

"How much did it cost taxpayers when we've got 234,000 Queenslanders out of work and businesses that are struggling."

The opposition leader also criticised the government for allowing to AFL executives to quarantine in a luxury resort, where they're able to "go play golf and get coffee", while forcing Queenslanders to quarantine in closed hotel rooms.

"These are questions that I think Queenslanders are rightfully concerned about; there can't be a rule for one and not for the other," Ms Frecklington said.

Australian Associated Press