HI SO IDEA.... Gideon is a micromanaging freak who was probably very invested in monitoring radio activity, and maybe befriended Celia by accident over the radio. She was close to winning him over and convincing him that Lundegaard would be safer with a network of allies. When she died, he wanted to close the community up like a clam. But... when Roswell suggested to let in her allies to judge the whole murder situation, he only put up a weak fight due to established trust w/ Prescott.