Gone With the Wind is an EXCELLENT movie albeit a bit changed from the book.
Personally I think there re many great examples of movies based on books. Some have notable changes, but nonetheless excellent. And I read Little Women because I loved the 49 movie so much, and still enjoyed it thoroughly!
Yes, GONE WITH THE WIND is a great movie and it pretty much stuck to the book. There are many such examples of good to great movies that though they had to cut down on what could be shown and said, did the book justice. OTOH...many, even older movies with great casts, fall far short of the make, such as the 1950's IVANHOE!
Since you like GWTW, see RAINTREE COUNTY, which is good and sticks pretty well to the book too.
The '49 remake of LW is cloyingly sweet; the Katherine Hepburn one is better. Every damned remake ( movie and T.V. series ) after these 2, have been dreadful!
I have seen ever single movie and T.V. rendition of A CHRISTMAS CAROL ( except for the newest one, which I refused to suffer through ) and THE best one ever made is the 1950's Brit Alistair Sims one; it is the closest to the book.
ASAIK, the ONLY movie that is word for word, scene by scene exactly the same as the book is the 1963 LORD OF THE FLIES. There may be others, but I don't know about them.