Gemma Longoni graduated from the Giuseppe Verdi Conservatory in Milan in 2010 and completed her master’s degree in 2012 with highest honours under the tutelage of Cinzia Barbagelata.

From 2013 to 2015, Longoni resided in Basel, where she further honed her skills in baroque violin, obtaining her master’s degree at Schola Cantorum Basiliensis under the guidance of Leila Schayegh.

She was a member of the European Union Baroque Orchestra from 2011 to 2012, holding also the role of section leader. Currently, she is the concertmaster of the Geneva-based orchestra Geneva Camerata (GECA), where she occasionally holds the role of concertmaster. She also collaborates regularly with Accademia Bizantina, Kammerorchester Basel (KOB) and Spira Mirabilis, and since 2023 she collaborates with Ensemble Zefiro as concertmaster and section leader.

Since 2019, she has been involved with Theresia Orchestra as concertmaster and tutor for the string section, a role she also assumed with EUBO upon its relaunch in 2022.

She recorded with EMI Classic, CPO, Amadeus, Deutsche Harmonia Mundi and Sony Classical.