This was floating around reddit last week, but I finally found where it came from. It turns out it was 3D printed and the instructions are up on Instructables. From the source:
In this instructable I will show you how to make a fully 3D printable GlaDOS from Portal (1 and 2), that is also a lamp and can be converted into a robotic arm (how much cooler does it get), With a superled in the eye (this much cooler).
I have never wanted a 3D printer more than I do right now…