There are a bunch of linux tv card drivers, but you would need to provide more specific information on the tuner. There are no programs for watching tv specifically, but i believe mplayer can access capture cards, and the command line program cat, which captures video from a tuner card, would not be to hard to recompile for the gp2x. I have no idea if the tv tuner would actually work or not, and you would need a break out box as well. Interesting idea
