It appears if you own a business or if you have a job you should not call, email, text, speak, tweet, Facebook, or mail (if people still do that) a Georgia legislator about a piece of legislation or any issue that may become legislation in the State of Georgia. If you do, be sure you register and pay your $300 fee to become a lobbyist before communicating.
A recently published Advisory Opinion, 2011-01, issued by the Georgia Government Transparency and Campaign Finance Commission has received a fairly good amount of ink as you can read here, here, here and here for starters.