I'm thinking about doing this on the grill, has anyone tried?

I have done it and while theoretically it's possible to direct grill it, I'd indirect grill it skin side up. Another cool way to cook turkey on the grill is to beer can it: use a Foster's "oil can" and a Weber charcoal grill rotisserie ring to raise the lid high enough to accommodate an upright bird.

I've smoked and/or grilled a bunch of turkeys ,and spatchcocked chickens are my usual on my Weber. I can't tell you how many holidays I've been without power and have been thinking that it would be Christmas on the grill. I think adapting the AntoniaJames turkey would be easy: indirect heat, the lid will make it nice and smoky.

I've grilled whole turkey on the grill a number of times - works a treat. You want indirect heat (a Weber-style kettle grill works great) and I found that the turkey cooked a fair bit more quickly than expected...that could be that it was in Australia and therefore a much smaller bird than what you get in the US.