GE GP220 system?

Hi all, (I'm slowly getting back up to speed with the list!) Spotted in Seattle last week - a General Electric GP220 controlling a large industrial robot arm. Is anyone familiar with this beast? Is it even a computer as such? It's a big cabinet (maybe 6ft high, 3ft wide), and this one had an Apple ][ perched to one side, giving the impression of a console - but maybe the GP220 is just some sort of interface between the Apple ][ and the hydraulics of the robot arm, and the Apple actually contained all the smarts? However, there was a large hand-held controller attached to the GP220 with a big keypad and LED readouts - unfortunately the photo I grabbed was a bit too fuzzy to make much out on it (but one of the LED seven-seg displays looks to say 'program no.' underneath, implying that the system did have built-in intelligence of some kind). There's also what looked to be a built-in CRT on the front of the cabinet too, but it was covered by a large shroud and wasn't obviously displaying anything when I saw it - it could have been nothing more than a piece of glass over some mechanical readouts or something else deep within the bowels of the cabinet. Power input was a hefty 460VAC 3-phase at 40A according to the data plate. No obvious build date, unfortunately. cheers Jules