Definitely change that oil. As for where that gas might have come from in the first place...
I'm not sure whether this applies to a Victory or not, but in the old days [no electric fuel pump & gravity fed carb] if someone flipped the throttle a lot when the bike wasn't running gas would wash down into the cylinder, past the rings & into the lower end of the motor. Jut a thought, but I might be dead wrong about this happening on the Vic with it's electric pump & injection.