Look up the error code Rosso. Error code 13247, like I linked, indicates high traffic on the GTS server of Nintendo. That does not mean the official GTS will stop working, it means that some traffic does not get processed in a timely manner.
It will, but it's Nintendo's side, not ours.
No.
Comments from Nintendo or PokeGTS? If PokeGTS, then Willaien already posted at the start of this thread right after me. As for Nintendo, not that I'm aware of. I have not bothered to go through the whole thread to see what all has happened, but this is the news I have. Just relax, it'll blow over soon.