From what I understand: A concealed handgun in the glovebox or otherwise in the vehicle can be considered concealed by anyone in the vehicle
28-1212. Presence of firearm in motor vehicle; prima facie evidence.The presence in a motor vehicle other than a public vehicle of any firearm or instrument referred to in section 28-1203, 28-1206, 28-1207, or 28-1212.03 shall be prima facie evidence that it is in the possession of and is carried by all persons occupying such motor vehicle at the time such firearm or instrument is found, except that this section shall not be applicable if such firearm or instrument is found upon the person of one of the occupants therein.