Heh, Ginny was there on the train platform, wanting to go to Hogwarts, in Book 1. Just like young Lily at the end of Book 7.
I was distressed that the movie OOTP decided to include practically everything and hence the storyline whipped by too fast to really be enjoyed, and some stunning character portrayals were “Now you see them, now you don’t.”
One of those stunning portrayals was the actress that played Ginny.
Yes there was a certain sense of coming full circle, wasn't there?
Now go back and read Book 1 again. The first wizards he really meets in the first book, are the last ones mentioned in the epilogue. Neville, Malfoy, Ron, Hermione, Ginny.
As Ravenclaw's door said: a circle has no end.