This bill creates a new program called the Great Lakes Gateways Network to help protect and showcase the natural, historical, and cultural treasures around the Great Lakes. The Secretary of the Interior, working with the EPA and other partners like state governments, nonprofits, and private businesses, will provide money and expertise to identify important sites around the Great Lakes—think state parks, historic seaports, archaeological sites, and recreational areas—and connect them together. The goal is to make it easier for people to visit these places, learn about the Great Lakes region, and understand its history and environment. The program will also create water trails that let people travel by boat between different Great Lakes sites and connect to land-based attractions. To make this happen, the bill sets up a grant program that gives money to states, local communities, nonprofits, and private organizations to help them conserve, restore, and interpret these important resources. However, the federal government will only pay for up to half of any project's costs—the rest has to come from other sources like donations, volunteer work, or local funding. The bill provides $6 million per year from 2026 through 2031 to fund this entire effort.