Gerhard's early patrons, the Fugger banking family of Augsburg, returned to patronage of the arts around 1580.
With Carlo's help, he also made about fifty over-life-size terracotta statues of saints and angels that line the interior of the Jesuit church.
Maximilian III commissioned small-scale bronzes, including equestrian portraits and mythological statuettes, in addition to his tomb and other large projects.
When two bronze statues by Gerhard arrived in Prague in 1602 Holy Roman Emperor Rudolph II critically said of them: "the workmanship is subtle and pure, but the positioning of the figures is rather poor.
Gerhard's works includes sculptures in bronze of Perseus and Medusa, Venus and Mars with Cupid, Mercury, an allegory of Bavaria, Tarquinius attacking Lucretia, St. Michael slaying the Devil, the sea-god Neptune, and in terracotta, a quartet of personifications of the seasons.