That was an eloquent and heartfelt goodbye and I commend you for it. I'm not sure of how deeply Graeme's faith ran or exactly what his level of surrender was, but I can tell you that he was in fact a Christian. I know this because he called me a few years ago and asked me if I would consider marrying him and his (then) girlfriend. I told him that I was in seminary and he thought that I was a pastor. I told him that I was not ordained, but in true Ghost like fashion he said "no problem, still want you to do it."
He mentioned that he was either a presbyterian or a methodist, but I can't remember which. Like I said above, I don't know what level of surrender Graeme had, but I do know that he accepted Christ at one time or another.