Given Gladio lives in the towers and it's close to the mines entrance, Gladio's going to end up at the Mines rather quickly. You better believe he's going to be fortifying the position as soon as he can.

Once he figures out getting deep enough lets him get powers, he's going to summon out his weapons, and use that to do small strikes out into the world. So his stuff is going to be heavily focused on defense and safety. And mostly focused around the small area around the mines.

I do not intend for him to be bitten, but he can haul people out of trouble if they are on their way to the mines.