Thank you to Tom, Colby and John for you assistance.
I'm still fighting these issue trying to get my ID-51 running with the Qnet Gateway.
My RT Systems programming software won't save an entry with out a Callsign in the repeater 1 position... and when I try to transmit after entering a callsign there I get this in the gateway log:
Jun 11 00:43:52 raspberrypi-qnet qngateway[416]: MYCALL [ K0HYD? ] failed IRC expression validation
I was able to link to Reflector 30C using the Send UR Call field in the QnetGateway Dashboard. I can also unlink there. After linking to 30c this way I was able to listen to QSO's. But when I try to transmit using the Use repeater entry with CQCQCQ I get the message above. Here are a few lines from the link log after linking this way:
Jun 11 00:46:31 raspberrypi-qnet qnlink[429]: Connected to call REF030
Jun 11 00:46:32 raspberrypi-qnet qnlink[429]: Login OK to call REF030?? mod C
Jun 11 00:46:33 raspberrypi-qnet qnlink[429]: sending File:[/usr/local/etc/linked.dat], mod:[B], RADIO_ID=[LINKED REF030 C???? ]
It appears in the gateway log that the subscribe to DSTAR2 also works from the Send UR Field. But if I try to Subscribe or Link from the radio I get the failed message above. Here is my entry in the RT Systems Programmer:

I also used K0HYD? B in that field following the directions of a YouTube video from K9WLW. I get the same error with both entries. Here's the My Callsign entry form with the UR Callsigns that go into the "To:" field:

I had to enter the data for the MYDVAP repeater using the radio's software as RT Systems Software woudn't save the entries.
I'm hoping there are some ID-51 users out there using QnetGateway that can help.
Thanks again for all the help so far.
73
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Dale L Puckett
K0HYD
Goddard, KS 67052
Member Society of Professional Journalists