That seems to conflict with what MD was saying about the smart gas meter having to have a smart electricity meter to communicate with, unless in both cases the gas meter is battery powered with a low-power transmitter which talks to the electricity meter, which in turn is mains-powered and does the communicating.
Does your gas meter talk to an electricity meter, or does it send data back to the gas supplier directly, or even via a separate modem or router situated indoors, do you know? (In my previous property, there was an LPG tank in the garden, with a battery-operated radio link direct to the supplier to tell them when it needed topping up, so I can imagine something similar with an independent smart gas meter).