The GPS module itself seems to be working when it delivers gps_accH values. Looks like the antenna is mechnically broken or defective or not connected proper.
gps_accH < 2 is needed to get proper coordinates. My bird do GPS fix between value 1.3 and 1. How many sats do you have? Did ST10 got a good GPS? In RemoteGPS there is column 'Accuracy'. It should be 40 to 60. Sometime I see there values up to 120. However, than smaller then better. Bad conditions is all above 120.
Checking the ST10 too says something about the GPS conditions overall.
br HE