A PCV is used to recycle exhaust gases that get past the piston rings back into the intake. Having a dry sump doesn't change the fact the exhaust gases will still get by the piston rings. I suspect the GT has a PCV. PCV is a ugly device. I took an intake manifold off a a car with less than 3000 miles on it and the intake passages were coated with an black oily mess. That is what you get with PCV and EGR. Mixing oily gases with exhaust gas, yuk.