http://cc.porsche.com/icc_pcna/ccCall.do?rt=1498845768&screen=1680x1050&userID=USM&lang=us&PARAM=parameter_internet_us&ORDERTYPE=991810&MODELYEAR=2018&hookURL=http%3a%2f%2fwww.porsche.com%2fusa%2fmodelstart%2f

Update: select models on the upper left and you can choose the GT2 RS.