ST. PAUL, Minn., May 6, 2016 /PRNewswire/ -- Today, Minneapolis-based outdoor retailer Gander Mountain announced their Platinum Walleye sponsorship of the 2016 Governor's Fishing Opener, taking place on Big Sandy Lake in McGregor, Minnesota. This marks 69 years of the annual tradition and Gander Mountain will join Minnesotans all over the state on Saturday, May 14, for the opening of the fishing season.