Did you even read the post? The whole thing talks about how this is AMD's new version of mantle which is specifically for gcn cards. It even says who its written by at the bottom, the senior manager of engineering at AMD.
No it doesn't. It puts out that it's making something called gpuopen, which right now is just a brand page with a bunch of fluff and nothing more with links to resources that are already available on AMDs website, but with nearly all of the AMD branding removed.