I personally always guessed that the last four words on Gilmore Girls, the words show creator Amy Sherman-Palladino has been thinking about for a decade, had to be words between Lorelei Gilmore and Rory Gilmore.
So, Matt Czuchry knows what the final scene is, but he doesn’t look to be in that final scene, since the creators had to share the ending with him.
This doesn’t necessarily preclude his character from ending up with a Gilmore.
The show has first and foremost been a series about a mother-daughter relationship, and to me, that ending would make the most sense, and wouldn’t preclude Luke and Lorelei figuring their stuff out or Rory finding someone to spend her future with.