Hi, I figured it out.
There is Tool Change tab in Settings where one can add code that is specific to the Shapeoko. When a T1M06 is sent, the machine appear to ignore it, but it does trigger gSender to initiate a tool change routine evident in the console output, which causes incompatible movement for the Shapeoko. You can customize that routine in the Tool Change tab in Settings (the gear icon). I added those macros from GitHub, I linked above. I have different issues now, but this specific problem has been solved.
