Thanks for the advice. I can't remember whether or not the card had 256mb RAM. I do remember that the RAM wasn't listed as DDR3 (like it was on the GT). But, I think I might make a trip to the mainland next week. So, I'll take my card in-box and receipt along with me. If the GS is still there, I'll make the exchange.
As you said, though, the GT is a nice card...faster than anything I've ever had. So, if the GS is gone or not 256MB RAM, I won't be disappointed.
Boo on in store shopping! Boo!
EDITED to add: if I have the drivers already setup in Windows, will it be a problem just to switch out the cards?