Just because she asked for 60 days doesn't mean that she will get 60 days.
As for the change of venue, the courts in GA will look to whether GA, or CA, is the most convenient forum to hear the matter.
The court will look at how long the children have been in CA, as well as other things.
In determining if it is an inconvenient forum, the court shall consider if it is in the interest of the child that another state assume jurisdiction. For this purpose it may take into account the following factors, including:
1) If another state is or recently was the child's home state;
2) If another state has a closer connection with the child and his family or with the child and one or more of the contestants;
3) If substantial evidence concerning the child's present or future care, protection, training, and personal relationships is more readily available in another state;
4) If the parties have agreed on another forum which is no less appropriate.
If you do not already have an attorney I would suggest that you retain one as it will be more costly over the years for you to have to fight future legal battles in CA as opposed to Georgia.
I wish you well.