To determine if the gas is on or off with the MEC ME952GRY Gas Outlet Box Dual, you can check the following: 1 - Shutoff Valve: Look at the primary shutoff valve for each outlet connection. If the valve handle is in the open position, gas is flowing. If it's closed, gas is off. 2 - Secondary Safety Shutoff Poppet: This should also be in the open position when gas is flowing. If it's closed, gas is off. 3 - Hinged Cover: Ensure the hinged cover with the latching mechanism is securely closed. If it's open, the gas might be off.