It was a tax-thing...only a technicality. And nothing to worry about. Basically, they just paid off a massive bill from the gov't. So now they're even, with one less monkey on their backs.
This thread should help to give you a better sense of where GM is at now.
http://www.camaro5.com/forums/showthread.php?t=2834
And on that note:

Let's continue this conversation in the linked thread, yes?