Addressing the comment here of the Edim verses the A7b9 when playing this tune in the key of C. It's easy to see that the Edim has the E, G Bb Db notes, right? Well, look at it this way. The E is the 5th note of A7b9, The G is the 7th of A7b9, The Bb is the b9 of the A7b9, the Db is the 3rd of the A7b9. Thus all you need it the A note added to the Edim and you have the A7b9. This is all over the place in the old standard Jazz tunes of which Georgia is an old Jazz Standard.