I am fortunate, I suppose, in that there are a few independent music stores near me with a good selection of new and used gear. I rarely go to GC. It's also further away than the local shops. For a few miles more I could be at Atomic where the used gear choices are endless.
I agree with
@Gary Blanchard, online has probably hurt mom and pop music shops as much, if not more, than GC. Pretty much the same story for a lot of brick and mortar retailers. Sears and K-Mart are hanging on by a thread. Speaking of Sears, I see that Lowes is now carrying Craftsman tools. That could signal the end of their stand-alone stores.