In September 2021, a major $100 million expansion of Gun Lake Casino was completed, doubling the size of the gaming floor and adding more space for entertainment and dining. The project is expected to be complete by March 2025. UPDATE: Gun Lake Casino hosted a groundbreaking on May 19th, 2022, for its planned $300 million expansion that will add a 15-story, 252-room hotel and a 32,000-square-foot “aquadome” containing three pools. Betting on sports futures, props and lay bets.