Well, that link points to the docket for my court and judge (S.D.N.Y., Martin Glenn). But as far as why they renamed the company, I'm not completely clear, though
might provide a clue. Sounds like GPH is a separate entity spun-off of the SGI now owned by Rackable. I don't think this suggests any significant developments are afoot, it seems to be just some necessary corporate/bankruptcy shuffling. GPH is apparently a "debtor-in-possession" company, which means that they retain some assets (hence the "holdings" in their name) with which they probably intend to generate revenues to reimburse creditors. Nothing to get too excited about - any brilliant and innovative employees have long ago departed the company for greener pastures.
Google probably has far more info on this, I just don't have time to dig for it right now.