Australian.
It's pronounced Gay-Eff-Ell.
Seriously, if you've ever watched it, it's like watching cricket - if you're not interested in it just watch the highlight reel on the sports news, because the rest of it is fumbling around for the ball and doing pansy slapping catfights whenever someone's not taking a mark to punt the ball thirty meters.
Rugby League on the other hand, is like Rugby, except several degrees of magnitude greater in awesome, although a bit of it is arguably just massive hulking dudes running into each other at lethal velocities,
I mean, at least the dudes in the NFL have decent padding.