The Gieke family is one of the pre-made families that came with the Open for Business expansion pack. They appear to learn a lot about robots and electronic gadgets. Although Chester doesn't appear to have any knowledge about Robotics (indicated by his lack of mechanical skills or Robotics talent badge), his bio does give a clue that he's more interested in gadgets or any other electronic stuff than in socializing with other people. He is also a Knowledge Sim.
Gieke -- "a fool, dupe, simpleton" "to croak, cackle," "to mock, cheat" "wild men" or a geek, a slang term for someone who is either has a heavy interest and knowledge in a hobby or someone who has high intelligence.
Carl Gieke -- "A rude, rustic man; a churl, "a common person" or a free man"
Lucy Gieke -- A surname derived from place names in Normandy based on a male personal name, from Latin Lucius.
Chester Gieke -- A male given name: from a Latin word meaning “camp.”