GLD Editor requires firmware version 1.3, available to download at https://www.allen-heath.com/key-series/gld-series/#tab5
The information below is from the GLD Series Brochure
GLD Editor gives you the ability to configure the system offline before the show, check and edit show files from guest engineers, and control the mix live using a PC or Mac.
GLD Editor software is available free of charge and gives complete wired or wireless control of the GLD system using standard TCP/IP Ethernet.
Online mode has the ability to carry out different tasks at the same time.
For example, monitors can be tweaked on stage using a wireless laptop while another engineer runs the FOH soundcheck from the mixer.
The similarities with the GLD mixer and touchscreen GUI make GLD Editor an invaluable learning and training resource too.
N.B: GLD Editor and iLive Editor are not compatible