See my post #17 in this thread.
http://www.flyertalk.com/forum/trust...o-tsa-pre.html You'll see that even though I am a permanent resident, I have GE and have occasionally (not often) had Pre-check without being enrolled in the TSA application program. (I actually didn't know that you could. I'm not going to waste time and money doing it because I'm sure it'll make no difference at all.)