My local RS had zero of the 5s last year on release day, none for preorders either.
That is the last place to go IMHO and I doubt you can return the GC.
These are the type of stories as well as my own personal experience with retailers such as RS/Target/Walmart etc that make me not go to them for iPhone releases. They all want a piece of the pie and make promises for product availability on release day but usually fall short. No thanks.