She penned the novels Pigeumallion aideul (피그말리온 아이들 The Pygmalion Children), Agami (아가미 Gills), and Bangjuro oseyo (방주로 오세요 Come to Bangju) as well as the short story collection Gouineun anijiman (고의는 아니지만 I Didn't Mean to But).

[1] Gu's debut novel Wijeodeu Beikeori was translated into Spanish by Minjeong Jeong and Irma Zyanja Gil Yáñez.

[3] Her debut novel Wijeodeu beikeori (위저드 베이커리 Wizard Bakery) mixes mystery, horror, and fantasy.

It is the first young adult novel in South Korea to employ magic as a major plot device, breaking the convention of the genre to deal with only realistic settings.

The judges of the Changbi Prize for Young Adult Fiction chose Wijeodeu as the winner because it is a fantastical allegory that deviates from the standard coming-of-age story set in schools.