User blog comment:Warmachine375/When will Gun Gale Online become an anime?/@comment-5741122-20130811043743

Not entirely sure about GGO into anime, but we will DEFINITELY be seeing more anime:

http://www.crunchyroll.com/anime-news/2013/08/09-1/sword-art-online-anime-tv-special-planned

Based on the name, it will probably be based on Progressive, but that is not confirmed yet.