Gridded Reference Graphic (GRG) widget allows an analyst to create grids for use in partitioning geographic areas of interest. Grids can be defined from a point or area and based on dimension, reference system, or time and speed. Gridded reference graphics can be used in a variety of operations, including search and rescue, cordon and search, and clearing operations
This April 2018 release of the solutions-grg-widget repo works with the AGOL 6.1 release of Web AppBuilder for ArcGIS.