Disregard the previous tech's suggestion, as a control is not needed. We had issues with the Gemini latches, and you simply need to replace the latch switch motor assembly for the lower oven. The latch switch is not coming around full circle on the cam, so the control is picking up on this. There's a Gemini manual around here somewhere.
You might need the first 2 digits of your serial number when ordering the lower latch assembly, as they made a change between 10 and 15 on the serial numbers regarding the correct part number.