Hello, I hope I can offer you some assistance.
The most likely cause of this is the 3 amp engine fuse in the fuse box under the bonnet. For some reason this fuse tends to blow when jump started. If the outside temperature is showing -55 this indicates an open circuit in the sensor circuit so make sure all the fuses in the GEM are OK as again jump starting can blow fuses.
Start with these points let me know if I can assist further and I'll reply as soon as I'm able to.