Here's what we know:
* Rhett leaves Scarlet: At the end of the book, after the death of their child, Rhett declares "My dear, I don't give a damn," and walks out on Scarlet, leaving her alone with the weight of her world.
* Open ending: The book concludes with this dramatic exit, leaving the future of Scarlet and Rhett ambiguous.
There is no definitive answer to whether they reunite. Some readers believe that Rhett's departure is the ultimate rejection, while others believe there's still a chance for them to work things out. Ultimately, Margaret Mitchell leaves it up to the reader to decide.
Therefore, the answer is: There is no clear answer, as the ending of Gone With the Wind is open to interpretation.