FWIW, Gibson does a lot more than make guitars. The guitar making across all the brands they own is a pretty small part of their overall operation. They own Philips Consumer Electronics, for example, which makes a fuck ton of stuff not music related. They also are partnered with Onkyo and I believe they own most of it. From a few things I have read, the guitar business is profitable, but a relatively small part of their overall portfolio. I think they bet on growing some of the brands they acquired and had some wildly optimistic numbers in mind, then a big recession hit and a softening in consumer electronics, which made them borrow more money to keep things going, and then, well, you eventually borrow enough that you have to pay higher interest rates, which makes things worse in terms of cashflow. I'm sure the sagging guitar market and their giant missteps in 2015 probably hurt too, with some of their safer business income faltering.
I read the creditors might step in and force changes, likely sacking the management (like Henry). Henry would still be an owner, but no longer in charge. The other option might just be for Gibson to restructure all that debt in a bankruptcy. I don't think any other guitar company could step in and buy the whole of Gibson, but the creditors might break up the company if they were to take control and sell the guitar division. Just guesses from various things I've read.