What is gap credit card payment address? Answer: The payment address for the Gap Credit Card is: Gap/SYNCB. PO Box 530942. Atlanta, GA 30353-0942.What is gap insurance customer service? The customer support phone number of Gap Insurance is 800-562-6900 (Click phone number to call). The postal and official address, email address and phone number (helpline) of Gap Insurance Service Center and Gap Insurance customer service phone number is given below.What is the phone number for gap? the Gap Customer Service Phone Number. Phone Number of the Gap is +1.800.427.7895, 614-744-3907 . The Gap is an American retail clothing company and a clothing chain whose products are sold out in different countries of the world. The company is originally known with the name of 'The Gap Incorporation'.What is gap in customer service? Customer gap is the difference between customer expectations and perceptions. Expectations are the reference points customers have coming into a service experience; perceptions reflect the service as actually received.