Since opening, the Tribe has invested $415 million in the property, including with the latest expansion, which adds 450 more slot machines and electronic table games. “With each new amenity and expansion, we increase our ability to contribute to the well being of the community and our tribal citizens.” “As a tribal citizen and a member of this community, I am proud to watch the growth of Gun Lake Casino,” Peters said. The new 72,000-square foot expansion features more seating for live concerts and sporting events, additional gaming space, outdoor fire-lit entertainment, and dining space, enhanced exterior features, and the ability for a guest to place wagers on their favorite sporting event. Gun Lake Tribe Chairman Bob Peters and tribal council members cut the ribbon on the Gun Lake Casino’s $100-million expansion last Friday morning.