Description
You may see "GND ", "GND*" or "GXB_GND*" in the list of All Package Pins. This list is shown in Fitter/Resource Section under Compilation Report or <design name>.fit.rpt under the project folder after you compile your design using Quartus® II software.
Resolution
You can find the definition of "GND ", "GND*" or "GXB_GND*" in the header of the Fitter/Pin-Out File under Compilation Report or <design name>.pin under the project folder.