The GWA G.I.S. Department is led by Gordon Wilson, who provides maps for the staff of the GWA and the Skeena Fisheries Commission, as well as updates and maintains Gitksan territory maps, produces Gitksan cultural heritage maps, among a wide range of other things. Data for maps created come from a combination of Provincial data set, Federal National Topographic data and data created from the hard copy maps used in the Delgamuukw court case.

This department within the GWA plays a crucial role in documenting and visualizing the multi-faceted geographical history and land claims of the Gitksan people.