Hello to all , same thing here. The messages appears whenever GPS_AUTO_CONFIG is set to "1". If you set it to 0 the messages are gone.
My gps is a Banggood M8N ( clone ) but the latest time I flew with 3.5.0-rc2 or 3 I haven't seen this message.
Any Clue? Maybe this is the normal operation...
Messages in the terminal doesn't show anything other than that related to GPS.