GSF, Inc. is DICKEY-john’s exclusive national distributor for its commercial grain testing product line. DICKEY-john's commercial moister tester, the GAC 2100b was named by the USDA/GIPSA/FGIS as the United States official standard grain moisture tester in 1998.

GSF also sells and supports DICKEY-john instruments designed for the farm market, such as the GAC 2100 Agri, Mini GAC and Mini GAC plus.

GSF and its service subsidiary, Ag Star Services, provides service and support on the estimated 13,000 DICKEY-john grain analysis computer moisture meters operating in the U.S. today.