I got them at Kroger in GA.
I didn't have the easiest experience using mine, so I won't bother anymore unless I at least get fuel points.
(My issue was that you can't combine them online easily like Disney. We have 3 kids, so we ended up with several gift cards. We charged to the room and then tried to apply them to the room balance. It just took a long time since it isn't all one system. I have a few cards for our next trip and I will just use them at the point of purchase this time.)