As i say before, i talk about this site:
http://www.fsdreamteam.com/couatl_liveupdate_notes.html
Which is, as you say before, no longer updated.
Except that very site IS updated with the information you asked about the GPU. And it has been further updated as well, with a subsequent improvement about the jetway numbers so no, the site IS updated and I never said it has stopped to be kept updated.
But where can we now see if there is any Update ??
On that site, of course, which tells you the last two updates were at the end of May, and in mid June. The updated YOU asked for ( the GPU ), was the end of May update. So no, the site itself IS updated, what is currently not working, is the update NOTIFICATION, the thing that, while you are inside the sim will TELL you there has been an update.
Not that this would change much what you have to do, since you got that notification while you were in the sim, you would still have to quit to do the update so, the only thing the notification would save you, is to check the above site every time before you start the sim.
So yes, as I already explained several times, until the update *notification* will be back, checking the above site is still the best way to know if there has been an update, at least one meaningful enough to justify updating the above site.