If your gas oven is warm even though it hasn't been used for over a month, it could be due to a few different reasons:
Pilot Light: Some gas ovens have a continuously burning pilot light, which is a small flame that ignites the gas when the oven is turned on. The pilot light is designed to stay lit at all times so that the oven can quickly ignite when needed. If your oven has a pilot light, it will produce a small amount of heat even when the oven is not in use.
Heat Radiating from Nearby Appliances: If your gas oven is located close to other appliances or heat sources, such as a refrigerator or stove, the heat from those appliances can transfer to the oven and cause it to be warm even when it's not in use.
Poor Insulation: In some cases, a gas oven may have poor insulation or a faulty seal, which can allow heat to escape or transfer from other areas of the oven. This can result in the oven remaining warm even when it's not in use.
If you are concerned about the warmth of your gas oven when it's not in use, it's a good idea to check the pilot light (if applicable) and inspect the oven for any signs of poor insulation or a faulty seal. If you're unsure or suspect a problem, it's always best to contact a qualified technician or the manufacturer for further assistance.