[kng]

tested on hw stack with voltage divider 3.3V-D1-0V.

Without GPS module:

DEBUG: No GPS detected
gps
  -> off, unpowered
gps on
  -> gps toggle not found

With GPS module:

DEBUG: GPS detected
gps
  -> off, unpowered
gps on
  -> ok
gps
  -> on, powered, no fix, 0 sats
gps off
  -> ok

current consumption in sensor mode and gps connected:
powersaving off, rxps off, gps off: 55.06mA
powersaving on, rxps off, gps off: 15.69mA
powersaving on, rxps off, gps on: 48.48mA
powersaving on, rxps balanced, gps off: 11.25mA

[IoTThinks]

powersaving off, rxps off, gps off: 55.06mA
powersaving on, rxps off, gps off: 15.69mA
powersaving on, rxps off, gps on: 48.48mA
powersaving on, rxps balanced, gps off: 11.25mA

Thanks for your testing.
I will capture the test result to the Wiki.