You can choose whether appear or disappear Google system group.
Move Menu > Setting
Check or uncheck ‘Include Google System Group’ Menu
Influence of this setting:
I recommend adding new contact information, using GangBook itself information.
If you make Google system disappeared, new contact which you added from system phonebook application would not be shown up.
Because new added contact is normally belonged to ‘Contacts’ group.
You can also find new added contacts at ‘Contact’ group if you check ‘Include Google System Group’ menu.