I had to create a tapatalk account, but then you can log into GBCN with your existing username/password. Basically you need 2 accounts to get in, since ideally they want you to log into Tapatalk to access all sorts of different boards, each of which have their own accounts.
I've been trying to confirm my email address with tapatalk for MONTHS. It keeps saying I need to click on the link they emailed me but they never email me a link! So obnoxious!