The official Twitter account of Sword Art Online Alternative: Gun Gale Online announced the upcoming TV anime series is scheduled to premiere April 2018. The spin-off light novel is written by Keiichi Sigsawa, the author behind Kino’s Journey. Additional details such as the animation studio, staff and cast have yet to be announced.
TVアニメ「ソードアート・オンライン オルタナティブ ガンゲイル・オンライン」は【2018年4月】より放送開始決定！ #GGO
— TVアニメ「SAO オルタナティブ ガンゲイル・オンライン」公式 (@ggo_anime) January 3, 2018
Yen Press description of the series:
Karen Kohiruimaki always felt out of place in the real world. Due to her extreme height, she found it hard to make friends with other girls her age. Everything changes when she’s introduced to VR and Gun Gale Online. In GGO, Karen is free to play the cute, chibi avatar of her dreams! Can Karen find friendship in this bullet-ridden MMO…?