Pr. by 48. He was one of two ex-praetors, Galba and Cosconius (see above on no. 55), who were murdered by Caesar's mutinous legionaries in 47 (Plus. Caes. 51.5; cf. Dio 42.52.2). He cannot be identified with no. 52, the historian and grandfather of the future emperor, who attained the praetorship in the late Republic (see MRR 2.465), since the latter was a son of Caesar's legate and murderer (no. 61), who had held the praetorship as late as 54 and survived until 43. Galba might possibly be the monetalis (no. 20, see 2.453), or the senator (no. 21) who was with Juba in 49 (2.497; Caes. BC 2.44.3), but neither of these was demonstrably a Galba. (RS, CP; TJC; and see above on no. 55)
(Broughton MRR III)