Doing this from memory here.
The 20th Georgia flag was shattered by an exploding Union shell at Gettysburg so that one is not around. They lost another flag at Fort Harrison in September 1864 to a New York regiment which sent it back to Brooklyn but it has not been found since.
The Georgia Capitol Museum holds no flags from this regiment either.
This regiment gets asked about for flags quite a bit - and I wish the news was much better.
greg Biggs