Anchorhead said:
Do we know if theatrical re-releases are counted in the overall earnings of a film through the years? Including its opening release, Gone With The Wind has had thirteen theatrical releases from 1939 to 2014.

Also, those are just the studio releases. There have probably been countless retro-theater runs as well which may have made significant amounts of money. That’s how I first saw it back in the 1970s. There was an old theater from the 1930s that had month-long rotations of classic films. Gone With The Wind was a regular there for years.

Yes, re-releases are added to the films total earnings (including any special/ directors/ extended/ 3D editions)