I know this question has been recently brought up several times, here is the most recent.
On the Area 51 site they list the progress of all the stackexchange sites, and here is the page for GIS. For comparison here is the page for the Stats forum (I did not know of this until someone recently posted it on the Stats meta forum).
I figured some of these metrics weren't brought up in the former questions regarding GIS getting the axe or growing the community, so this question is worth revisiting in a new (and hopefully well viewed) thread.
So we are doing well or excellent in percentage answers accepted, number of answers per question, and okay in the number of views per day. Where the metrics say we are lacking is the number of questions and the number of high rep users (high rep defined as simply 200 reputation, a seemingly quite low standard).
As a researcher I feel exactly the same as Matt Parker listed in this answer, and we need to ask more questions related to such topics (myself included) to both help growth and develop a core body of experts. I think one thing that we are lacking, both in analysis related and programming related questions, are simple questions that are oft encountered. Even if the user knows the answer such questions will be good to drive up traffic and allow other users to gain more reputation. They will also create templates of simple "FAQs" to point users to.
I know the dichotomous reading of the metrics are silly, and these statistics are as comforting as they are disconcerting, but if the Stackexchange sites care about them I feel we should care about them as well. It seems an easy solution to increase the number of questions asked, even if the expert knowledge to answer those questions is quite low to simply help the site grow at this point.