Tailgaters Alley didn't have a website last season. I bought some gear there at the game and brought it back to Wisconsin with me only to find out it didn't fit (I know my size but this particular Nike pullover ran super large). I called up one of their stores and the guy I spoke with on the phone was great, he had me mail them the pullover and he sent me another one a couple days later. Long story short: no website but those people are really helpful.
The Barnes and Noble is also great. There and Tailgaters Alley are pretty much your only hope for GT Nike polos and gear.
Speaking of Barnes and Noble, they used to offer a Ralph Lauren custom GT polo on the website but I haven't been able to find it the last couple of years and they do not carry them in the store. Their website is pretty much useless for ordering gear, the selection isn't even close to what they offer in-store.