Sam, the pitch is simply the center to center distance between pulley teeth. It is a function of the pulley type used.
GEBE originally used xl type pulleys and the pitch on those the pitch is .20". The newer kits are HTD (high torque design) type, and I don't know the pitch, because I have the old style. They are metric and come in 3mm, 5mm, 8mm pitches. 5mm is closest to the xl pitch at .197", so it's probably that one.
Belt width on the old xl style is 3/8". If the new ones measure 11/32", that converts to 9mm, which is a standard HTD width, and very close to the original xl type.
I've estimated the number of teeth on my xl spoke ring as 266, for purposes of calculating gear reduction. This includes the blank spots, and is a function of measuring the diameter and calculating from there. It's only an estimate.