I'm sure most of you know this, but i had seen conflicting info. Here is the law for state parks, GA Code 12-3-10:
(n) It shall be unlawful for any person to use in any park, historic site, or recreational area any electronic device for the detection of metals, minerals, artifacts, or lost articles or for treasure hunting.
(n) It shall be unlawful for any person to use in any park, historic site, or recreational area any electronic device for the detection of metals, minerals, artifacts, or lost articles or for treasure hunting.