His brother Seneca, who dedicated to him the treatises De Ira and De Vita Beata, speaks of the charm of his disposition, also alluded to by the poet Statius (Silvae, ii.7, 32).
Adik laki-lakinya, Seneca Muda, mendedikasikan karya-karyanya De Ira dan De Vita Beata kepada Galio, sambil mengatakan mengenai pesona disposisinya, yang juga disinggung oleh penyair Statius (Silvae, ii.7, 32).