All settings in the Configuration Screen including GPP Manager are Global and will apply to all Registers.
Comcash Classic Development is adding all the GPP settings to their GPP Manager Interface. However there are still many settngs that require Comcash Technicasl support to install.
Enter Manager/Configurations and select the GPP Tab for a list of available settings.
If you don't see what you need ask. There may be an option available not listed, or Comcash Development may add it for free or a quoted price.