Does my will need to be notarized by Georgia law?

Your Will need only be witnessed; not notarized.  However, it you have a self-proving affidavit, that must be notarized.  This affidavit does away with the need to locate the witnesses at such time as the Will is entered into probate.  It's a good idea to have one; it will make things easier and save on expenses if the witnesses do in fact have to be tracked down.

Note:  The number of witnesses to a Will varies among jurisdictions; sometimes it's two and sometimes it's three.  Just be sure to comply with your state's requirements as to this.