His only known work is the three-voice motet "Salve mater misericordie, stella maris," found in the Trent Codices (I-TRbc 92, 135v–136).
[2] There the piece is attributed to G. Dupoitt, but the name has often been misread as G.
The motet text also appears in a 13th-century English conductus found in Oxford Bodleian Library manuscripts GB-Ob 489 and 591.
[1] According to musicologist Peter Wright, Dupoitt's setting is awkward in its melodic and harmonic writing, though its mensural usage is of interest.
[1] Free scores by G. Dupoitt in the Choral Public Domain Library (ChoralWiki)