ELLIJAY — Georgia took a big step Wednesday toward expanding where licensed gun carriers can take their weapons, as the governor signed a bill allowing them in bars without restriction and in some churches, schools and government buildings under certain circumstances. Following mass shootings in recent years, some states have pursued stronger limits on guns while others like Georgia have taken the opposite path, with advocates arguing that people should be allowed to carry weapons as an issue of public safety. The bill makes several changes to state law.