Thanks Guys, I'm starting to get the picture. GPSD is definitely on ttyUSB1, so that isn't the problem.
RS232 was connected to the GX2150
VHF. In theory it should all be ok, so I will double check all the cables and
wiring. Earlier had the GX2150 connected to a
Furuno GP32 GPS, and it received GPS signal perfectly. So the
radio isn't the problem. That pretty much leaves the
wiring and soldering points.
I'll redo it and test step by step and post the results here. Thanks for pointing me in the right direction so far.
Cheers
Melvin