Legal Question in Family Law in Georgia

If you're asking can parties agree, with a judge's approval, to deviate from the guidelines, the answer is that a judge can allow it, but it is up to the judge. Generally a lawyer will know if a judge is likely to accept a deviation, and how to word it to make it more likely a judge might okay it.

Sure, as long as the judge approves the agreement. Consult with a local attorney.