Idunno. Overall, my experience with them has been far from the nightmares so many people seem to have. I do think that charging to set up an instrument being purchased from them is absolutely, patently ridiculous, and when I picked up a hollowbody electric guitar a few years ago, I set it up myself to avoid that. And I tried to buy a Korg MS-20 mini from them, but they had only the floor model in stock and offered a laughably small "discount." So I bought one from a west coast dealer for $100 less, free shipping, no sales tax. That's GC's fault for poor inventory choices.
But I've walked out of there with cables, some books, other synths (Volca Beats, KeyLab controller, etc), and pedals. For whatever reason, they priced a new-looking BP-355 at $60. And a local guy makes pedals and sells them to the store, so I nailed a Flying Pan clone for $100.
And amazingly enough, there are a handful of staff who have been there for a few years. Compared to some other replies, it sounds like I've been a lucky duck, which is especially good because my local shop has so little inventory that I couldn't buy anything from them when I was looking for a new 4-string. Though once upon a time, they had this Ibanez ATK305 with OBP2 installed at a good price...and it came home with me.