Welcome to GCA! You can become a member here. If you are already a member, simply log in and this will become a renewal page. If this is your first time using this site and you are already a member, then complete the New Member Signup process using the email address you used to become a GCA member: you will be prompted to reset your password and will be able to log in to the renewal portal.
If you purchase a membership after October 1, your membership will also be good for the following year.