Refer a business to GTB and save up to $500! Our Customer Referral Program is a simple and easy way to receive up to a $500 credit on your bill. When a customer directly refers a new business to GTB, the Referring Customer receives 100% of the new customer's monthly recurring charge* after the referral becomes a GTB customer. Submit your referral by clicking on the button below or by emailing us the business name and contact information at referral@gtb.net. We will take it from there! Learn more.