I can only assume the issue is the assumption that the state of Georgia is not allowed to charge for works it publishes.
In the UK similar guides such as the Civil Court Practice guides are used by judges and solicitors but it's not free. This isn't published by the government and costs around £500. In other areas of law there are other commercial works that act as guides to the laws, few of which are free.
The government also publishes guides but in general they're of limited value. In the past the government guidance was far more detailed but very expensive to maintain. This was probably one of the reasons the government's guidance has become more general and is now always prefaced by a statement that it isn't an authoritative guide.
Being unable to recover the costs of producing such annotated guides has been very effective at making sure that commercial companies are now the main providers of such guidance, a win for free enterprise if not for justice.