The multiple-choice quiz boasts 30 questions and three levels of difficulty: easy, medium, and hard.
"Taking the Ontario Trivia Challenge is a great way to mark Canada Day," McGuinty said in a news release Friday.
"Ontarians can test their knowledge of our great province and learn more about our rich history and diversity."
Not surprisingly, one questions asks what Ontario's official flower is. The answer, of course, is a white trillium.
Oddly enough, the premier's recently launched high-technology website, which features streaming video and the most images of McGuinty this side of his mother's living room, does not display the Liberals' controversial new trillium logo.
Instead of the much-panned "three-men-in-ecstacy-in-hot-tub" design created for $219,000 by Grit-friendly ad firm Bensimon Byrne, the premier's official site still displays the traditional three-petal trillium that dates back to 1964.
Since the Toronto Star revealed last week the Liberals' puzzling scheme to replace the classic logo with one that bears a suspicious resemblance to the trillium on the party's trademark, the newspaper has been inundated with letters, e-mails and calls from readers angry about the change.
One elderly woman called the Queen's Park bureau to say she broke down in tears at the eventual extinction of a government logo that predates Canada's Maple Leaf flag.
Another gentleman wrote to the Star's editor in chief to complain about "an ugly little drawing that doesn't even look like a trillium."
On a more comedic note, a botanist rang to say the design actually resembles poison ivy.
Well, the imbroglio around Trilliumgate certainly has senior Liberals feeling itchy!
One politico who is enjoying the kafuffle is Progressive Conservative Leader John Tory, who launched a website at savethetrillium.ca, which displays the different official designs of the provincial flower over the past 42 years.