User blog comment:Warmachine375/When will Gun Gale Online become an anime?/@comment-65.87.40.88-20130813080113/@comment-6697950-20130813080336

SAO and ALO were both 1st season, just different arcs. There was no break in-between the arcs to form a second season.

Plus, an anime season is either 1-cour and usually has 13 episodes or 2-cour and usually has 25 episodes. In this case, it's 14 and 11, so they're not separate seasons.