I have no experience with that make of GPS, but I have recently gotten my Garmin eTrex to work perfectly, though it goes through a serial-USB adapter first. To do this, I plugged it in, and ran
dmesg | tail
This will get any hardware activity that has been happening, and grab the last 10 lines. Looking through this might give you some information to use. If you're using GPSDrive, you might be able to set it up to use that make of GPS, and tell it to point to the correct USB place, as will be stated from dmesg. For mine, it mapped it to /dev/ttyUSB0, so I simply entered that in, and it worked.
Beyond this, I have no idea.