 On 27 Apr 1642, he was consecrated bishop by Antonio Marcello Barberini (seniore), Cardinal-Priest of San Pietro in Vincoli, with Faustus Poli, Titular Archbishop of "Amasea", and Celso Zani.Bishop Emeritus of Città della Pieve, serving as co-consecrators.Gabrielli was elevated to Cardinal by Pope Urban VIII in 1641 and in February 1642 was made Cardinal-Priest of Santa Maria Nova and was elected Bishop of Ascoli Piceno.