The only ancient writer who mentions him is Quintilian (10.1.90), who laments his recent death as a great loss; as Quintilian's work was finished about 90 AD, this gives a limit for the death of Flaccus.
Gaius Valerius Flaccus (died 1st century), Latin poet at the time of Vespasian
Gaius Marius | Valerius Maximus | Gaius Cassius Longinus | Gaius | Gaius Marcius Coriolanus | Gaius Hostilius Mancinus | Gaius Gracchus | Gaius Baltar | Verrius Flaccus | Gaius Sextius Calvinus (consul 124 BC) | Gaius Sextius Calvinus | Gaius Salvius Liberalis | Gaius Norbanus | Gaius Mucius Scaevola | Gaius Memmius | Gaius Marcius Rutilus | Gaius Lucilius | Gaius Julius Civilis | Gaius Fulcinius | Gaius Flaminius Nepos | Gaius Claudius Glaber | Flavius Valerius Severus | Quintus Valerius Pompey | Marcus Valerius Messalla Appianus | Gaius Vibius Marsus | Gaius Valerius Flaccus | Gaius Suetonius Paulinus | Gaius Sosius | Gaius Pontius | Gaius Pomponius Graecinus |
Saleius Bassus, Roman epic poet during the reign of Vespasian; a contemporary of Gaius Valerius Flaccus