If it is not a couple then J already has different titles with all his women.
He is a friend to Anandi, husband to Ganga and well wisher to saanchi. And there is no more scope of establishing any other relationship with Gauri except that of a well wisher. I don't think they will suit as friends now.
My personal favorite is Jagya Gauri. When I say that I think of those two medical students who walked shoulder to shoulder with a spark. There was something about their chemistry I admired. And I also wished for Ja Ga reunion at one point, particularly when they were finalizing J's third marriage. But Cvs put Gauri in cold storage.
However I never wanted Ja an reunion, even if Shiv was not in picture
Now J is Ganga's husband so thats fine. Now I can only wish for Gauri to move on.
SaJa were just never meant to be together.