GWS is a good strain. Greenhouse is a touchy subject on these boards, and the GH owner, Arjan, has been called into question many times for unscrupulous business practices regarding strains and their originators. Search around, I don't care to get into it. I'll just say Shanti has my support.
That said, a seed is a seed, and if you love the plant it produces does anything else matter? :shake