GPS built-in module is available only for product versions 12.xx.xxx and from 13.00.xx4.
GPS built-in module is the interface between Python and module internal GPS controller. It is used in order to handle GPS controller without dedicated AT commands through MDM built-in module.
If you want to use GPS built-in module you need to import it:
import GPS
then you can use its methods like in the following example:
position = GPS.getActualPosition()
gets a string with position information formatted in the same way as AT$GPSACP response.
More details about GPS built-in module methods can be found in the following paragraphs.