Lowpost,

GIR is "Greens in Regulation"

For example on a par four you have to hit the green in two and par five in three to have a perfect GIR, if you miss the green you will need to get "UP AND DOWN" to save par.

Don't worry to much, it is only there for pundit stats really. It may however help your game if you consentrate on your GIR per round to help improve your game.

Ian.