Google Now lock screen, and home screen widget is no longer a fiction. You can get this update now from the Play Store. The update comes with some other improvements, movie passes from Fandango, movie ratings from Rotten Tomatoes, real estate listings from Zillow, a music button when a song is playing in voice mode (US only) and US college sports support. I just tested it on CM 10.1 and it works just fine.
Download From: Google PlayStore