Registering for the GMAT® exam is one of the easiest steps in deciding to get an MBA. You can do it from this web site. To make an appointment, you'll need a credit card (Visa®, MasterCard®, or American Express®) and an idea of when and where you want to take the test. If you’re not sure where you can take the GMAT® exam, you can search for test centers and available appointments before committing to an appointment.
For further information, you should visit the Take the GMAT section of this Web site and read the articles under Register for the GMAT® and Schedule a GMAT® Appointment.