G.♣.
I think it just means that the potential boss didn't want to give anything away, good or bad.
Some people play it very safe when it comes to conducting job interviews. They are very careful to behave in the same way to all candidates, make sure every candidate gets asked the exact same questions (often by the same people) so that everything is "fair." This is very often the case with government jobs and big companies, as there are people to answer to and you don't want to give anyone any reason to think there was favoritism of any kind.
I've also been on interviews when I thought I knew walking out the door that there was no way I was going to get the job ... and then got a phone call later that week. One time I was offered the job on the spot! (That was so cool!)
I'm sorry to say, that I think you're just going to have to wait it out. This interviewer isn't giving anything away until he's ready.