There were many types of Gladiators.
Romans used the different Gladiators to reenact scenes from history, or make mock bouts:
Sort of like, who would win if...
One was meant to represent a Greek soldier, due to the helmet SpeedoDad is wearing I figured that worked best.
The Greek Gladiators would be equipped with a spear and a short sword, more of a dagger.
They were meant to represent the weapons of the Macedonian pike-man.
A viking spear with a stout dagger would look very similar to the Gladiator style.