Have you tried SUA in first place? It even supports emerge (and then basically you can install anything Gentoo repositories have to offer in it).
You mean half as much as comparable Macbooks, right?
Fun fact: Windows not only supports and uses SSE, SSE2, SSE4 and SSE4, but it even supports and uses AVX instructions which ONLY are able to run on Intel Sandy Bridge and AMD Bull****r CPUs.