For The Friend and me, salmon is "done" at 125 - 130 degrees. Since timing is uncertain -- depends, as already mentioned, on the grill, the thickness, the temp of the salmon when it's put on the grill -- the rest of the menu shouldn't be time-sensitive, and is ready to go on the table, so when the salmon hits the mark.
There is no "absolute" answer to this question it depends on the thickness of the cut and the heat of your grill---I always prefer real wood for that additional smokiness. I tend toward the briefer time in cooking minutes, and the most basic suggestion is that "it's done when it's done". Keep an eye on it and don't burn it or dry it out.
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