If your engine a horizontal or vertical cylinder? Horizontal garelli bikes are NOI engines, and the vertical cyl are the VIP. VIP engines came in a few speed transmission option, but never single speed. You should most likely have a 2 speed automatic if it is a VIP engine.
Fortunately this should not matter for what you are trying to set up. However you could make things a little easier and just get a vip 12v cdi ignition from moped division. I just saw all the bits you would need for sale on their site. You would just replace the whole plate with the new cdi plate and add in the cdi box they sell. Your current HT coil should work for the cdi.