The "General Reference" close reason has been rolled out on a very limited basis.
We're watching the use of this close reason in actual practice before rolling it out more widely. We are not adding the "General Reference" close reason to other sites unless these questions are shown to be an actual, wide-spread problem on the site.
This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information.
"General Reference" isn't so much about questions which are easily findable on the Internet. It's more about those times when a question is asked in the way a 12-year old asks how to spell "trivial"; For those time you just want to shout "Why don't you just go look it up!"
The main concern is that an explicit close reason will only will arm users with the mission to close any question that has been answered in Wikipedia or can be found through a Google Search. That's not what "General Reference" is about.
For the time being, "general reference" questions can be closed as "not a real question".