Someone may be more of an authority on this, but looking at the boards, I think you might need to have the GBFans Wand Light board at least as an interface with the sound board, even if you use your own lights.
You can see on the sound board that there are screw terminals to wire up to your own wand switches, shown on the left of this photo...
However, there are no connection points for lights here, other than via the ribbon cables.
Looking at the light board that connects inside the wand, you can see that the lights all attach at the top, via a single strip connector, although it looks like you might be able to reconnect your own lights into that connector, if you wanted to.
Again... I could be way off-base, so I defer to anyone else who might be more experienced with the electronic kits. I just got all of the GBfans sets, and it was pretty much plug-and-play.