What happens if PCs are impressed enough that they want to start worshipping Gladios? Does it grant any special, sword-only spells? Swords aside, must it be an evil deity?
If I was ruling on it, the PCs who chose to could make a Pact of the Blade with Gladios and become Warlocks. Depending on the particular set of rules and the setting, they would either swtich classes entirely or dual-class.