Rockett Pedals GTOTour Series The new GTO is the latest design coop with Guthrie Trapp. The original was sort of the Nashville favorite, recreating the old Nobels ODR 1. A great sound in itself but Guthrie wanted more; ) The new GTO has a much tighter bottom, less gain and more cut in the mix. It can go from super mild to a really nice, dynamic OD feel. This pedal has compression but in a great way. You can use it as a clean boost and EQ or you can bring in the dirt.