Online Banking Services Gulf Coast Bank's online banking services offer smart banking technologies to make banking with us convenient and secure! Start taking advantage of our online banking services now with one of our affordable personal checking or business checking options today. Login to online banking here. To sign up for Online Banking, enroll your personal account or enroll your business account. Gulf Coast Bank does not charge a fee for using Mobile Banking or Alerts. Message and data rates may apply. Please check with your service provider for specifics on any fees and service charges.