Gray Tribe is wildly different from Libertarian. The former supports universal healthcare, free high-quality public education, and generally a strong social safety net paid for by high taxes on the wealthy.
Everything I skimmed talked about them as libertarians, and keep coming back to the same two articles as source material which describe libertarianism as a starting feature. I didn't get a sense that they were for strong welfare and public education. It doesn't matter anyway, because the issue itself is 'tribal politics', and so 'making a new tribe' doesn't solve that problem.
To be honest, the OP's description where the favoured group was clearly superior than the dumb-as-rocks alternatives reminded me of a book I once saw. The author had decided that since there were 13 lunar months in a year, there should be 13 zodiac signs. So she invented a new one - the spider. It's defining features were 'magic' and 'mystery' and it was just all-around better than the other signs... and conveniently her birthday happened to fall in the range of this new sign. :)
