Mixinmaster,
Although I have not "had" to, I can definitely say that the GG pad could comfortably be used on the ground. It is wide enough that if you fold it in half (as I do when packing it), you get double the thickness and--for me, at least--an adequate amount of width. I'm 6' tall, so it is not a full length pad, but if that bothers you, you can always put your pack or some clothing underneath your delicate little calves.
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