Italian composer. [...] He probably spent his youth in Bari under the guidance of Giovanni de Marinis, maestro di cappella of Bari Cathedral: he is represented by one piece in Marinis's Primo libro de madrigali a sei voci [...], and works by Marinis are included in Gallo's Primo libro de madrigali. [...]
Source: Iain Fenlon: Giovanni Pietro Gallo quoted from Grove Music Online accessed 8 October 2010, Complete article (requires subscription).