Santa comes out at GCH starting at 4:45. Here is the schedule as I remember it below.
4:45- 5:30
5:45-6:30
Lunch
7:00-7:45
8:00 - 8:30
I would suggest that you make sure to position yourself how you want it. The photographers were not very skilled. Also, make sure they take a few and have them get in close, otherwise you will not get alo tof tree and instead will get alot of floor.
Have fun and Merry Christmas.