Wouldn't this mean if you are on a bicycle with a gun in a school zone or in a park, you are ok as long as you stay on the bicycle?
Bicyclists riding on a highway are granted all of the rights (including right-of-way Article IX) and are subject to all of the duties applicable to the driver of a vehicle, with certain exceptions. [5/11-1502]
https://rideillinois.org/safety/bike-laws/