While working on the help files, I noticed that the goldweaver doesn't produce cloth, but yarn. Yarn is generally produced by spinners, and not by weavers. Shall we rename the worker to "Goldspinner"?
Yes, I know this sounds funny to Germans
The building could be Goldspinnery, Gold Spinning Works or Gold Spinning Mill. "spinning works" wins the googlefight hands down, so I'd vote for "Gold Spinning Works".