If the glow crank pin is 9.00mm diameter it will fit. However, the crankshaft alloy and hardness of the gas engine is different. The glow crankshaft has no key or keyway. Also, If your engine has run on glow, the crank pin will not match the needle bearing any more, and big-end needle bearing life will be quite short.
You will need a gas engine crank, prop drive, connecting rod, new head, ignition + spark plug.