in 2014–15, gjersem competed at her first senior grand prix assignments, placing 11th at 2014 cup of china and 12th at 2014 nhk trophy. in january she became the norwegian national champion, after placing 2nd in the short program behind her twin sister. gjersem won the silver medal at the 2015 nordic championships. she placed 17th at the 2015 world championships, the best result for a norwegian ladies' skater since the 1940s.