People who call Gideon cold/arrogant are clearly missing these scenes. He's very reserved and introverted, but that doesn't mean he doesn't care about everyone. He takes a lot of time mentoring Reid like a son, and he's always very gentle with the victims they rescue. Literally in the very first episode, after they rescued the woman and she was in the ambulance, Gideon stroked her hair and told her she'd be okay.
