I was looking at Bulbapedia, I'll post a link in the bottom.
At first it may seem that GTS in the actual games are closing, but it's not. The Website is closing actually.
Owners of Global Trade Station claim :
“ Thank you for your interest in Pokémon and the Pokémon GTS website.
The Pokémon GTS website will close at 11:00 a.m. PST on 9/14/10.
Although the website is closing, you can continue to use the Pokémon GTS service to trade Pokémon in your video games.
The Pokémon GTS website is closing, but there is a lot of Pokémon fun and excitement on the way. Stay tuned to Pokemon.com for the latest news!”
Bulbapedia Source
At first it may seem that GTS in the actual games are closing, but it's not. The Website is closing actually.
Owners of Global Trade Station claim :
“ Thank you for your interest in Pokémon and the Pokémon GTS website.
The Pokémon GTS website will close at 11:00 a.m. PST on 9/14/10.
Although the website is closing, you can continue to use the Pokémon GTS service to trade Pokémon in your video games.
The Pokémon GTS website is closing, but there is a lot of Pokémon fun and excitement on the way. Stay tuned to Pokemon.com for the latest news!”
Bulbapedia Source