Why not shut off the gas at the meter, which is above ground by the house. Only takes 1/4 turn. Same place where gas company shuts it off for inhouse repairs or to lock it off for non-payment. Check it out if you have gas just so that you know where to shut it off in an emergency. All you need is a crescent wrench or large pliers.
Seems as though newest homes are all-electric and do not have gas available. Is this true?