There’s a great way to get your TV listings in Gnome. It’s called onTV and you can install it by typing this in a terminal:
sudo apt-get install ontv
Once installed, right click on your panel and add the OnTV applet. Answer a few questions and you’re ready to go.
OnTV shows what’s “on TV” at the moment and what’s coming up right afterwoods:
You can also search the listings for up to two weeks and get reminded before they come up.