We may all need to get some popcorn and watch this one over the next few years. I bet there will be a BOE letter out some time in the next couple of years addressing these issues. I would anticipate a bunch of mealy-mouthed nonsense trying to cover everything from all sides. It will be written by lawyers and written in a way that makes it clear to the elders that gay marriage isn't marriage so it doesn't make any difference what the government says. I'm guessing they will use this to make gay couples dissolve the relationship, they will be free to enter into a heterosexual marriage after that, maybe even have privileges; after all at that point they'll be a shinning example of how Jehovah fixes everything.
If there's a legal blowup, like a lawsuit over something; it will all be the fault of the local elders.
Edited to add: I don't know how a GLBTQ* person with the brains God gave gravel could sit five minutes in Kingdom Hall.