Single post in Gym Forum Rules

No, but a Gym may have 'underling trainers'. This is in keeping with the canon and the fact that all users may only have one Gym on our site. Allowing a second full "Leader" within a Gym would prevent the second person from starting their own Gym. One person should always be the primary Leader -- that's not to say the other person cannot be an underling (meaning a lesser) trainer, however.