There is no new information yet, just what was said today: we are working on making it available on GOG, and more details will follow.
Can you update the Kickstarter FAQ
(question titled "If I back Divinity: Original Sin 2 and I want to get my copy on GOG, will I still have Alpha/Beta access?
"), given that the information contradicts what's in the latest update
• FAQ: "However, the Alpha/Beta access that you choose won't affect which version of the game you get when it ships. So, you can access the Alpha/Beta through Steam and then get the final game on GOG.com if you want."
• Update: "You can’t play Early Access on Steam and then get the game on GOG."
PS: could you give me my D:OS2 backer badge?