They had an invite only one in the bard days before it was rebranded to gemini. You didn't just need to get the invite link but actually link your discord to your google so I didn't bother.

Just goes to show that google's attempts at chat have been a big flop and even though google chat exists they don't use it.

They did for the new copilot agent builder products, thats where I get most early invites.

They used to have a lot of IRC channels on freenode for Android.

I recall them taking about one for NotebookLM.

Jules, their cloud AI agent.