I think the GMC were swamped with complaints from the public following the Feb part of the ET, and they made a statement on their website about needing to await the outcome of the ET.
The regulatory bodies all have processes to follow, and there is a hierarchy of which organisations are expected to complete their own investigations before the next one will have enough information to decide whether they need to investigate too.
I think NC will almost certainly reiterate the "career-changing for one of them" aspect of her case during her final day of summing up. And I'm guessing the GMC will feel compelled to make another statement to clarify their own position, after the tribunal presents its findings.