I think Gone, Girl was supposed to be through Null, originally. Since it wasn't, they went ahead and skipped the catalog number and proceeded with Null 04 for Before the Flood. When Patriot's Day comes out on Vinyl, it should be Null 05. And of course, The Vietnam War is Null 06.

If Null re-issues Gone, Girl, somewhere down the line, it should have the Null 03 label.