If you would refer to the topic at top labeled "KY gun laws" it should point you in the direction of the law.
The law states that it is legal for an adult possess a firearm contained in the vehicle is if is "operated" by the adult. My opinion is this means that if you park your vehicle then there is no operator. So I would venture to say that no you can't leave your firearm in your car.
Btw, welcome to the forum. I hope you stay awhile.