So after searching in vain for a 64 bit driver (of any kind) and on the verge of giving up I decided to just try the 32 bit driver and had success. Vista 64 made the appropriate adjustments and away I went. Obviously, this is not a guarantee for others out there using this TV tuner who are also trying to run Vista in 64 bit, but if you are, I have copied the link to the driver (for those of you with Gateways) below.
http://support.gateway.com/support/drivers/getFile.asp?id=21603&uid=185155986