I do quite a bit of business with GC. I have gotten to know the managers as well as the staff. I don't think what you want is unreasonable and GC managers want to make what is wrong right. I have had some issues with gear and I have found them eager to solve issues. The first thing I do with any new guitar is inspect it long before I leave the store. That helps when wanting no hassles down the road. I also have the guitar set up by the independent luthier that has a booth set up at my GC. He is top drawer. He knows what I look for and makes sure neck issues are solved. I am a stickler for having the neck set up correctly and the intonation being right. Luckily he is the same way. He is great with adjusting the nut and making sure there are no high frets. He also is big on having the neck straight.
I know I have been reasonable with my requests so I am not shy about asking that these things be right when I buy the guitar. Also, each person has a preference on how high they want the action and if you work with a luthier enough, he will learn your tastes... A good one will ask you if the action is the way you like it. Honestly, I don't expect any guitar off the rack to be set up the way it should be or the way I like it. Lastly, if GC workers or management actually take time to fix an issue, I thank them in person and let them know I appreciate the effort and tell them that is why I keep coming back and recommending the store. I am sure there are horror stories out there as far as getting bad gear and the store people not caring. I just think you can work it all in your favor if you don't get too personal or emotional about the situation. As a consumer. we have the right to ask to have it the way we like it. So never stop trying to do that.
When the TC Electronic PolyTune came out at NAMM I told the manager at GC that it is going to be a very hot seller and that as soon as they start coming in that he might want to think about training the entire staff on what it is and how well it works. He actually did it and came to me a couple of months later saying I was dead right about how good the unit is and how well it has been selling. He thanked me for the heads up and my recommendation on training his people because it has paid off.