Pleaes help !!! Stepper Motor Question.

I have 3 Compumotor M83-135's. I just recieved them in the mail
today and what I thought was a eight wire stepper has turned into a
5 wire setup. I do not know if this is a Unipolar or Bi-Polar
stepper. The wire setup is as follows

Phase 1 + Wht
Phase 1 - GRN
Phase 2 + BLK
Phase 2 - RED
Bar wire - Earth shield

These motors support 1.8a per phase and they are NEMA 34 400oz
steppers. I don't know the voltage supported or the inductance.

I would greatly appriciate any insight one might have on these. Can
I use the Gecko drivers and if so, what do I do with the earth
ground? I had bought some C Series drivers and now I can not use
them cause they only use 6 or 8 wire steppers.

Thanks,
Shawn