@dymondaudio
As the iDR and the GLD are both mixers, there is no way to use the iDR as a stage box/expander.
You wouldn’t be able to connect the two via ACE either, as this is for control surface to mix rack on iLive or mixer to expander on the GLD (dSnake = audio and preamp control, but not mixer control).
Neither one of the mixers would be able to ‘discover’ the other.
With Dante, you would be able to share audio between the two systems but would still need to control the iDR directly for preamp control.
Thanks,
Keith.