Chapter 11 bankruptcy is not the same as going into receivership or liquidation. It is effectively a chance to wipe your debts and restructure the company. It is far from the company death sentence that we in Australia think of when we hear of company bankruptcies. It's probably been done to derail the legal action.
I don't mind the idea of Bonamassa being a shareholder, but Gibson needs shrewd and conservative management more than anything else. They need to make their core (and very expensive) products better quality and more deserving of the price tag, and they need to shy away from ill-advised forays into unnecessary product development.