Gaston Gosselin (b. 1999) is an American composer of contemporary classical music. Through timbral nuance, comedic synthesis, and bombastic gestures, his music can be described as the transformation of playful joy into profound emotional journeys. His music has been commissioned & performed by artists including Lès Art Nouveau Chalumeaux, The President's Own, The University of Cincinnati Cello Society, Dior Quartet, Beacon Ensemble, The Rhythm Method, Eureka Ensemble, Kendall Square Orchestra, and cellist Dave Eggar among others.

Gaston's compositions have earned him recognition and awards, including the Emil and Ruth Beyer Composition Award from the National Federation of Music Clubs, the Molly Garrett & June Fooshee Collegiate Grant from the Music Club of Hollywood Florida, and Mu Phi Epsilon from whom he received the Ruth Dean Morris Scholarship and the Original Composition Award in Divisions I, II, and III. He has also been a finalist for the Morton Gould ASCAP Awards. He has also served as a composition fellow with notable festivals such as the Mostly Modern Festival (USA), Mostly Modern Festival (Netherlands), Lake George Music Festival, Iceberg Institute, Cortona Sessions for New Music, and Conducting Institute.

In 2024, he founded the Boston-based performing group Beacon Ensemble, an ensemble dedicated to providing early-career musicians an avenue toward professional development through performing diverse and relevant repertoire alongside programming aimed at creating community betterment.  

Since 2018, he has been the Composer/Arranger in Residence and the Director of Development for the South Florida Clarinet Choir Les Art Nouveau Chalumeaux, a Miami-based summer ensemble that fosters collaboration among student musicians, professionals, and educators in exploring ever-developing new literature for the clarinet choir. In 2024, the clarinet choir version of his original work, Eureka, premiered for the ensemble's 10th anniversary alongside a collaboration with select players of The President's Own United States Marine Band.

From 2022 to 2024, he was the Artistic Fellow for the Eureka Ensemble. During his time with the organization, he aided in programming focused on using music to create social change in Boston's neighborhoods. Through a collaboration with Women's Lunch Place, he served as the Musical Director of the Women's Choir program. This program used choral directing and group singalongs to instill confidence, build courage, and bring comfort to one of Boston's most vulnerable communities. Through this fellowship, he also served as a classroom aid for the Desear Sonar program. Through their collaboration with the immigrant rights organization La Collaborativa, songwriting intensives, guitar lessons, and classes on basic music principles were brought to the children of immigrant and refugee families in Chelsea MA.  

Gaston resides in Boston, MA, where he works as an artistic fellow with the Eureka Ensemble. He holds a BM in Music Composition from the University of North Texas, where he studied with Sungji Hong, Kirstin Soriano, and Bruce Broughton.