The easiest way to get a cheap natural gas rate is to compare gas rates. Wholesale prices of natural gas are at all time lows, meaning you can save big by switching. And you have a lot of choices. For example several Georgia gas companies offer an introductory rate program where you pay $0.19 per therm that's half the typical rate of $0.44.
A warning, though. That great $0.19 rate will change every month as wholesale prices change. So you could see a second or third month bill that is much higher. But, you have the option to switch to a fixed rate at any time, as introductory rates are month to month plans. So, if you want to max out your savings. Check out a introductory term plan for two or three months then switch to a fixed rate 6 or 12 month plan.