As a Georgia resident, am I required by law to carry proof of Insurance?

Here is information regarding the law about proof of insurance: http://adac.georgia.gov/00/article/0,2086,1952842_6170_11794606,00.html. It appears that the insurance company is responsible for providing information about your insurance to the Dept. of Motor Vehicles to be entered on a database. Law enforcement checks this database for proof of insurance. They don't check your insurance card. 

You need to contact your insurance company and have them enter the new VIN number of the used car that you recently purchased. When you go to court, bring your insurance card with you and explain the situation regarding the newly purchased card. Get some documentation from your insurance company to show the court.