The text of the Georgia law is not copyrightable, and the article states this. The issue is with the annotations, which are basically links to related resources. These are made at great effort and expense by Lexis/Nexis, a private company. These annotations are copyrightable. The mistake is Georgia making the annotated version of its codes the "official" version.
Except every bill in the legislature is called "An Act to amend the Official Code of Georgia Annotated." It's not a mistake, the official version is the annotated version. There's no daylight between the mythical "unannotated" version and the annotated one.
Stripping out the annotations and publishing that should be completely kosher for copyright and would still give the controlling version of the law (assuming no copying errors were made, of course).