Your score related stats are generated automatically when you use the app as a scorecard. You also have the option to collect stats for Greens, Fairways and Putts. The green hits are automatically calculated from your score and number of putts. You can also review your statistics by all rounds, last 10 games and by year, also Match Play statistics can be reviewed.
To do this turn on the Statistics feature in your Golf GameBook app.
Open the application and go to the "Settings" from your profile view. Once there select "Personal Information", check that "Collect statistics" is turned on.
You can review hole by hole (putts, fairways, GIR) and overall round statistics from each game you play. Just open the game from your Profile. You can also view these from the game itself.