We check this website, now gp-hub.com is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is gp-hub Down Right Now? - NO! gp-hub is up!
If you have problem with access to site gp-hub, and domain gp-hub.com is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).