Gallic Infantry was most noted for their swords and while not shown chain mail (a form of lined armor) which the Romans adopted. While the helmets are a bit fanciful the with the horms and wings the general sdesign is correct.
The soldier on the left is very realistic. The central fgure is a standard bearer. The soldier to the right is a chief or tribal unit leader. The Gauls used colorful garments and large oval shield much like those of the Romans.