From the FAQ on the website where these things are sold, the impression is given that Toyan has no direct plans for a gasoline version, but has at least considered the option during design.
I am not going to mess about with designing or having a custom made ignition system, I am just going to use two "four-inline" ignitions. This is possible due to the 90 degree crank interval and the 90 deg bank angle, which makes for always two pistons in TDC at the same time. Going to be a bit of a puzzle which lead goes where, but that is no big deal. It does mix up the leads from one unit over both banks though, but I can get away with only one pair of magnets 180 degrees diametrically opposed on the flywheel (unless the flywheel is made of steel, then I have to figure out a timing disk on the NDE of the crank, where the belt is).

EDIT: I just realized that most likely the whole thing is set-up such that by turning one camshaft over 180 degrees, the engine becomes a "big Bang" with two cylinders firing simultaneously, OR an engine that fires one cylinder every 90 degrees of crankrotation. The latter should make extremely low idle RPM possible, and COULD be the reason why the engine in the vid apparently is hesitant to idle really low....