I use configurator so little I forgot it had the rudimentary GPS stuff. Sorry. Plus, it didn't help that part wasn't showing in your screenshot so I when I said I could see no valid data I really wasn't seeing anything there.
Then it would have to come down to the fact that your FC was not armed when trying to engage the GPS. I mentioned that in the first paragraph of my first reply.
MD is magnetic declination
http://www.ngdc.noaa.gov/geomag-web/. It is set in the GPS section of your firmware. You need to find out what it is for where you will fly. If you change flying locations, you will need to re enter new MD for new location. It comes set by default for Budapest Hungary. I guarantee that even minimal GPS functions like RTH and Pos Hold will not function as they should if this is set wrong. This calculator will figure out your MD down to street address
http://geomag.org/models/igrfplus-declination.htmlYour GPS baud is awful slow. I think nmea works at 57600. Make sure that your serial baud speed is at least that too.
Every GPS quad or whatever else should have its mag re-calibrated before every GPS flight. The following link tells about that and magnetic declination
http://www.multiwii.com/wiki/index.php?title=Compass_CalibrationThere is a bit of misinformation in the info about MD though. It states that you must enter the MD for your country. Totally wrong!! Magnetic declination is calculated to FLIGHT LOCATION. There is no such thing as a country wide MD. Mine changes if I go 1 mile away. It also changes over time. Still, every GPS quad or whatever else should have its mag re-calibrated before every GPS flight. It is required for others like DJI. Multiwii is no different. Since I had no idea how much you actually knew about GPS or anything else multiwii, I suggested an ACC re-calibration in case one has never been done. You are correct, it is stored in memory. However, it will go away when making changes to the firmware and uploading those changes to the FC so when setting your MD to your flight location, the ACC needs re-calibrated again too. Any time you modify your config.h sketch in any way and actually upload it to the FC, the ACC needs to be calibrated again as well as the mag. The trim settings for level mode will also need reset after any upload. So basically, unless you always fly at the same place, be prepared to occasionally re calibrate things. Since MD changes over time, even if you always fly at the same place an occasional re calibration will be needed to ACC, Mag, and level trim after the MD update that will someday come.
I hope you haven't been actually flying that thing with the failsafe disabled....have you?? It's not technically required for GPS flight. It should however, be functional on EVERY flight for everyone's safety. Flyaways have the potential to kill someone should the quad crash under the right circumstances. Li Po batteries can burst into flames in a crash. Never fly without a properly set failsafe.
Try doing the switch for GPS hold after you arm. See if that lights the indicator up green.
If you are running an FC that is capable of waypoint nav, why not take advantage of that and try it? You will need Win or EZGUI for that though. If you are running something based on a 328P processor, if you get pos hold and RTH to work at all you will be very lucky as that processor has minimal if any memory left to handle GPS functions.