[krapp]

I think you'd have to define "Geek", then somehow enforce the terms just in case someone invites a member who isn't sufficiently "Geeky." Otherwise you'll have people bickering over who belongs there and who doesn't. How about car geeks? Sports geeks? People who bite the heads off chickens for a living? Will prospective members have to prove their "Geek cred" somehow?

It's sort of like how Hacker News is for "anything that good hackers would find interesting," which sounds like it means something but really doesn't mean anything specific, and probably just resolves to "anything that correlates with the interests of the mods," like every other moderated community. Other than branding, what even is the point of using "Geek" at all?

But to actually answer you question, personally, no. I think there are already tons of sites which cater to "Geek culture" (or nerd culture or... whatever) of various niches, and of course if what you want in HN, but with invitation only, there is lobste.rs. Someone can basically set what you're describing up as a subreddit. I also don't like invite-only communities on general principle.