In the casino itself there are more than 1,800 slot machines and more than 65 tables including roulette, blackjack, baccarat, craps, and Texas hold 'em poker. The casino is also home to several bars and restaurants. The casino also has an 1,100-seat theatre that has become one of the main music venues in the Outaouais region. Attached to the casino is a 349-room Hilton hotel.

To the east of the casino is Leamy Lake (in French: Lac Leamy), from which it gets its name. This lake is home to a large fountain, whose jet is visible through much of the old Hull sector during the summer. The casino is built on a rocky precipice over what was once International Portland Cement Company quarry but is today Lac de la Carrière. It was inaugurated on March 24, 1996, as the Casino de Hull. In 2016, the casino provided the government with some CA$244,679,000 in profit, employed more than 1,400 people and attracted more than two and a half million visitors. The Casino du Lac-Leamy was built on an exceptional site in a former quarry at the edge of Lac Leamy. It is operated by Société des casinos du Québec, a subsidiary of Loto-Québec.

The Gatineau casino thus also serves the nearby city of Ottawa and Eastern Ontario. Ottawa, the larger city across the Ottawa River, was also planning to build a casino in the early 1990s, but these plans were blocked by the Government of Ontario. The casino was opened on March 24, 1996, in the former city of Hull, Quebec, the third of a group of casinos built by the provincial government to raise funds. The Casino du Lac-Leamy (formerly the Casino de Hull) is a government-run casino located in Gatineau, Quebec, Canada.

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