Zero G magazine was a sports publication which followed Zero Gravity Football. Dave Lister is a fan of the magazine, as he was the sport in general, and is a supporter of the London Jets.
When Lister threatened to take a chef's exam to outrank Arnold Rimmer, Rimmer paced the floor of the Drive Room in anticipation and worry as Lister was supposed to be starting his exam. To further annoy Rimmer, Lister relaxed eating buns (revising, as he called it) and reading Zero G magazine. ("Balance of Power")