1. Gunnison, Gunnison County, Colorado [insurance map] [cartographic material] Yale Public content 1926. 2016-12-16T15:11:12Z. 2017-05-30T21:06:10Z. Sanborn Map Company. Sanborn Map Company. English. cartographic image. Public. Colorado, Gunnison, Gunnison (Colo.), and Gunnison.