What brand of grill is that, BP?
I can't imagine what something cooked over pine - especially if it was still a little green - would taste like other than "yuck".
+1. I'd love to know what kind of grill that is.
As for pine, you might get away with it if you're usng a less-resinous species. All the stuff I have up here is pretty resinous or even fire-killed. The latter is great for other purposes like firestarting and certain wood crafts, as the resin has been baked right into the wood. It's similar to fatwood and some of it is almost waterproof, but it's not great for cooking. Anything that gets cooked over it tastes like the surface of the Brooklyn Bridge.