Probably the php security urgent updates

FWIW, there has been a major security flaw announced in PHP so worldwide a large number of PHP based websites have been taken down as a precaution until they can be patched. I can only assume gpstc is one of these, as its PHP version is quite old.

I've looked at what's involved and it's definitely doable (I'm running a patched version of the current GPSTC website right now having applied the patch myself) but I expect the site will be offline for at least a day or two to get it sorted out. And I would not be surprised if Ben is working on other sites that have the same issue.

Give them some space to work it out, there are a vast number of affected websites around the world, and I am sure that free-to-use ones are lower on a lot of people's priority list.

(The good news is that a new non-PHP version of GPSTC is just about ready to go, so watch this space.)