She is a member of the South Korean girl group Aespa, formed by SM Entertainment in November 2020.

[9] After 11 months of training,[8] SM Entertainment unveiled Giselle as the third member of Aespa on November 6, 2020,[10] which is the company's first girl group since Red Velvet in 2014.

[14] On March 1, 2024, Giselle was appointed as the brand ambassador for the Spanish luxury fashion house Loewe.

[15] On September 9, Giselle was appointed as the muse of the cosmetics brand Either&, which is based in Seoul but has plans to soon expand in Japan.

[16] In June 2022, Giselle donated KR₩10 million to Yuhengsa, which is a South Korean non-profit organisation that aims to protect and rehabilitate abandoned animals.