GS was developed by Jean-Luc Jannink, at the USDA's ARS Plant, Soil and Nutrition Research Unit at the Robert W. Holley Center for Agriculture and Health, in Ithaca, N.Y. GS is currently being used in cattle breeding. Jannick recommends that it be used with all genetic markers.
For more see:
O'Brien, Dennis. "A New Approach to Molecular Plant Breeding," Agricultural Research Services News, USDA, 16 April 2012.