Does geico car insurance carry over on a new add vehicle?

Answer 1

In the United States, If the vehicle is a replacement (trade-in) for the vehicle currently on your policy then it will generally be covered under the replacement rule so long as you follow the terms of your policy and notify the insurer within required number of days.

If it is an additional acquired vehicle then generally it is not covered until you notify your insurer to add it to your policy.