Kerry wasn’t involved. All he can offer is information told to him by others, which is just hearsay.
Perhaps he can provide a list of the Benghazi survivors and explain why they have been sequestered.
But I doubt Gowdy sees Kerry as culpable in any serious way. More likely he sees Kerry as a way to get to the unreleased documents and those that have redactions.
Kerry can be put on the spot to produce, and Kerry is the kind of arrogant but cowardly twit who will fold when confronted with the fierce determination of a pit bull like Gowdy.
Kerry is involved. The State Dept. has refused to turn over a lot since he took charge of it.