In the spoiler chat that Ilona and Gordon had, they said that: Ghastek is VERY power-hungry. He's very good at hiding it, but I think Gordon said something along the lines of, "he has big plans." So I suspect Ghastek would do what's best for Ghastek, regardless of the fact that he does like Kate. If being nice to her goes against his best interests, I don't think he'd hesitate to sell her out.