Frontier put a beacon up at a 9.90G landable planet I've found with a challenge. You are welcome to beat me, if you can!
Let's find that 10G airless planet! \o/
Heh, yeah. They're insanely rare above the usual 4G. I've found a handful over 6G, one over 7G and this one at 9.90G. That, from checking tens of thousands B, O and AeBe class systems the last 17 months, actively hunting these high gravity planets.
I’ve been looking forever, the highest gravity non-tagged world I’ve ever come across was a little over 5G, I think it was 5.2G? I’ve never found anything more punishing than that. Yet. They do seem to be quite rare.