Gull Lake is a lake in the U.S. state of Minnesota, located in Cass County and Crow Wing County. It is one of the largest lakes in the Brainerd, Minnesota-Baxter, Minnesota area and also one of the most popular. Of the seven Gull Lakes in Minnesota, this Gull Lake is the largest in area and shoreline. The shoreline is highly developed with residential and commercial interests. For each shoreline mile there are 27.8 homes or cabins.