The GCSB had no reason at all to spy on Dotcom from a New Zealand perspective. The only case being brought against him is a copyright case from US claimants. Who do you think can request GCSB to do it's work for them? I don't think they would have spied on him and raided his home because a foreign business interest was concerned. Unless the request came from a 5-eyes level organisation, I'm pretty sure it would have been illegal for them to act against Dotcom.