[2] In 56 BC, while tribune of the Roman citizens, Gallus tried to increase the power and influence of Pompey.
Gallus assisted the Greek Ptolemaic Pharaoh Ptolemy XII Auletes of Egypt to reclaim his throne.
[1] In 55 BC, Gallus was accused, probably by Marcus Colonius, for an unknown transgression.
During the civil war between Caesar and Pompey, Gallus remained neutral.
The historian Plutarch erroneously refers to the elder Gallus as Canidius.