Yes of course Fender has to be holding huge receivable with GC. I am not an industry insider but I would assume it's somewhere in the range of Fender annual profit best case scenario and equal to two years of annual profit if their credit policy has been loosey-goosey.
Now, whatever happens, Fender will never become a controlling creditor of GC. Their receivables have to be in the 1 to 2% range of GC debt, less if they have been careful. So it's not enough to control anything under any circumstance. When a large partner files for bankruptcy, you just get hurt bad.
This is partly why Fender's IPO's did not go through last year. Share price was too high and investors realized Fender's dependancy on GC was too high.
When it comes to independents picking up this business, its possible but the scale is huge. If you assume your independent store average size is $5M, it would take 400 stores doubling their business volume to make up what GC does annually. Even if only half the chain is wiped out in a restructuration plan, thats still a boatload of volume.