Board Thread:Questions and Answers/@comment-25926181-20141226232315/@comment-6697950-20141226232802

If you come up on the chat to ask questions, then at least wait for an answer before posting it on the forums as well...

Copy paste:

Season 1 consists of Aincrad (SAO) and Fairy Dance (ALO) arcs

Season 2 consists of Phantom Bullet (GGO), Calibur (New ALO side story) and Mother's Rosario (New ALO side story).

Episode 14.5 is just a recap episode. I.e. a short version of 14 episodes. Not really worth watching.

So yes, all the episodes are season 2, but naming them as "Gun Gale Online" is completely inaccurate, since GGO is only the first half of the season.