Yes. Give it about 5 minutes or so after servers come back up, you'll have the option to resub with gold from the character select screen. Be sure to be on the realm where you have the amount of gold to buy it with. It may take about 10 minutes or so depending on how fast people put them up in the AH. It took me around 20 minutes to finally complete the transaction as the token was always being "bought out from under me". When complete, it'll take a portion of gold from each toon you log in on that server to cover the cost. The amount varies though. Like my monk it took about 600g from her, but my paladin, it took 9k gold from her.