Although the signals are now defunct, I would like to introduce myself as the creator of the GW-PSK-2,4,8 and GW-OFDM signals while I was employed by Globe Wireless. From what I understand GW was not very protective of the MODEM specifications (there is no IP). They are basically a service provider and not a radio manufacturer. If anyone is still interested, I can answer questions or "grade" a decoder.
I hope decoding pf the signals was not too much trouble.