I know the GT midi specification inside out, but that data collection seems meaningless to me, it has not collected any midi data, only high level USB connection handshake data.
An easier way would be
midi clock sender software > computer USB > MIDX-20 USB1 > MIDX-20 USB2 > USB-Midi Device adapter 1 midi out > USB-Midi Device adapter 2 midi in > USB-Midi Device adapter 2 USB > computer USB > midi monitoring software.
If you send midi clock, the monitoring software should see it.
Does your GT-001 have the latest firmware installed?