Orbit gum wrappers are not made for human consumption and should not be eaten. The materials inside of the wrapper are not toxic, but they are not meant to be ingested.
There is gum like the Botan Rice Candy that has a edible rice paper wrapper, but Orbit gum does not have this type of wrapper. Instead, Orbit has a wax paper wrapping. It is designed especially for contact with food. There aren't any understood negative symptoms for eating the paper, but since the wrapping wasn't meant for human consumption, it hasn't been fully tested to see what effects eating it are.