I don't know what the "GOUGAT power products" are.
GSX can be accessed at the gate if engines are off and parking brakes are on. You will see a message about this, if you try to call GSX if engines are not off and/or parking brakes are not set.
There's a complete manual for GSX, which is best to read, and can be accessed in 3 different ways:
- Inside FSX with the "Open Documentation" button on the Addon Manager
- From the Windows Start menu, under the FSdreamteam GSX program group.
- By browsing the FSX\fsdreamteam\Couatl\GSX folder