Of course it's quite simple to transform the x°y'z'' representation into a floating point or integer representation of an angle, but I don't know if this is precise enough. It would be great to find out what the "reserved 1,2,3,4" fields in the Map & Guide output are. Like dbrashear mentioned, I also think that this are UTM coordinates. I used a utility to convert the long. & lat. of a point into UTM coordinates to prove that this is true, but the result was not excactly the same as in Reserved 1,2,3 and 4. In Map & Guide, these coordinates are called "Map and Guide coordinates". Maybe we can find out a function that transforms Reserved 1,2,3 and 4 into a gpsapp compatible format, because these values are more precise than x° y' z'' (with z element integer.)