Because you are not a Compustat subscriber, you cannot see the GICS codes for these companies, and our migration does not take into account the GICS codes of the companies in question. Instead, it looks at the RBICS codes and then classifies those codes into an approximation of the GICS code.
I suggest that you migrate your system to RBICS. Not only is it a superior classification system, in my opinion, but it fits exactly with the data that you're getting. You can find all the RBICS documentation in the reference.