CC3D or Atom flight controllers do not support GPS functions such as Return to base or Position Hold. The original CopterControl (CC) board does not have memory left for GPS use.
The only purpose for GPS use is telemetry using radio modems (OPLink) or GPS position send to OSD device.

NMEA is not supported anymore because is less memory efficient, this page only refers to UBlox GPS and UBX protocol.

About autoconfig

Others boards like Revolution support auto-configuration and no need this manual configuration using UCenter.
This means also if you connect your 'CC3D GPS' to a Revolution board, your previous configuration is lost !

If GCS show "Coptercontrol" while board is connected and you really want to setup a GPS, this page is for you. If not, take a look at GPS setup page.