When is Naruto Kakashi gaiden anime in English dubbed?

Truthfully, I don't think it will be. English episodes of Naruto (now called Naruto Shippuuden) are not being made. However naruto.com, run by VIZ, the English adaption company, have subbed episodes of Naruto Shippuuden. Kakashi Gaiden was a two part special that occured last week. It is subbed, but in my opinion are better than dubs. YOu can find this episode at cruncyroll.com, naruto.com, YouTube.com, etc. Sorry for the bad news, but it may be dubbed because it is a special. Maybe a DVD will be made for it.

^

Actually, this answer is entirely false :/

New episodes of Naruto Shippuden are still coming out, and yes, the Kakashi Gaiden is in fact being dubbed.

As a small note of proof/reassurance, Obito Uchiha's English voice actor is actually going to be Vic Mignogna, who also plays as Edward Elric (FullMetal Alchemist), Nagato (Naruto), Tamaki (Ouran High School Host Club), Spirit (Soul Eater) and a ton of other anime character's.