User blog comment:ILuvAnime/Fairy Tail continue after episode 175/@comment-60.51.48.184-20131011095506/@comment-33019320-20131011100855

At that time where the anime stopped, it was beginning to catch up with the manga so they had to end it midway in order for the manga to continue creating more material for it to adapt. They couldn't just pull a Bleach and shove a filler into the middle of an arc otherwise fans won't like it.

Anyway, now that the GMG arc is finished, the anime can continue without any problems (for now). Of course the only question that remains is when is the anime coming back.