No I don't have one nor seen one, but I want one :p:

Did some searching but haven't found much of anything concerning small scale wankel engines fit for a goped, so anybody have any information I could use regarding this?

that would be cool.
http://thekneeslider.com/archives/2007/05/15/mazda-rotary-engine-motorcycle/

http://www.rotamax.net/

found it.
http://www.youtube.com/watch?v=Mys4S1Fxrqs

the small rotary motors I've seen have all been sized for RC cars. Rotamax, I THINK is the company that makes the engines for the Moler Skycar, so I'd think their power plants are probably too large and powerful for a goped application.

For a goped you'd want a 1 to 5 HP engine, and it needs to be small enough that you can mount it so the crank shaft spindle can make contact with the rear wheel and drive it forward.

I've honestly been thinking of ways to turn my goped in to an electric scooter.

Hmm.. shame :(