In 1328, after accusations of betrayal from his brother Marco, as well as that of the assassination of his brother Stefano Visconti, the emperor had him imprisoned in Monza. Galeazzo was freed in March 1328 and took shelter under the other Ghibelline leader of Italy at the time, Castruccio Castracani. However, he died at Pescia in August 1328.
In 1328, after accusations of treachery from his brother Marco, as well as that of the murder of his brother Stefano Visconti, the emperor had him confined in Monza. Galeazzo was released in March 1328 and sought refuge with another prominent Ghibelline leader at the time, Castruccio Castracani. However, he died at Pescia in August 1328.