The oven shouldn't be hooked up to a gfci outlet they require too much amperage and any fluctuations cause a gfci to trip. Gfci are intended to use in wet locations or area's outdoors or in the garage where you stand on concrete. If it's gas it should be a 120v regular receptacle..............if it's electric it's 240v 30-50 amp type plug depending on unit and local electrician codes and should be a dedicated circuit.....check the outlet in your house make sure it's not sharing with other plugs and that's what's causing it too trip possibly is your drawing too much amps off other receptacles that are attached to the gfci circuit.