YES, It's for the GNX4, started for the GNX4 I'm told. then he added the GNX2 and GNX3 on that page. Disc 1 Clean amps; Disc 2, Classic Rock, Blues; Disc 3 Hard Rock Metal. Then there's the Ultimate package which is all of the discs on one disc. I thought it was 3 discs but it's only one. I got the Ultimate cause if you read on there is 2 years of updates plus sign in area for Ultimate users website. Here he's putting on tutorials, video tutorials, live sound and amp usage techniques and more. That site is supposed to launch Oct 7. I see what you mean, It doesn't specify the GNX model until you get to the order screen. I emailed him and he said he'll update the site.