It occurs to me that @xrvk’s use case could potentially be handled by the blog embed feature. You can create your google calendar and publish the rss feed for it, then set up a discourse category to import the rss feed for discussions about the events.
The way this feature is set up now, though, you can only have one category importing an rss feed so this wouldn’t work on my site. I often find myself wishing the blog embed features were in the category admin settings so that we could import more rss feeds into discourse, and use discourse to power comments for more blogs.