Final answer:
Spouses or dependents of military members or civilian employees may only be transported in GMVs under specific authorized circumstances, such as authorized evacuations or for official purposes like a change of station.
Step-by-step explanation:
The question pertains to the conditions under which military member or civilian employee spouses/dependents may be transported in government motor vehicles, often abbreviated as GMVs. Generally, transport of family members in GMVs is restricted and can only happen under specific circumstances. For example, if there is an authorized evacuation, or the family members are being transported for official purposes such as a change of station, these may be instances where transport in GMVs is permitted. It's also possible that family members may accompany the service member on official travel if it incurs no additional cost to the government. However, specific regulations and policies can vary between different branches of the military and different governmental agencies, so it's important to refer to the appropriate directives to understand all the qualifying conditions.