I'd be inclined to. Since my CV looks like alphabet soup anyways, it won't look out of place.... and it's a real, tangible skill. It'll either be ignored, will be an interview question, or will get you to the interview because the boss does it too.....

Or they might think "oh, isn't that that wacko geek so-called productivity thing" and throw the thing away. (Sorry, that was about the most negative description of GTD I could think of on the spur of the moment.

Personally, I'd react positively to a technical CV which highlighted effective organisation skills, regardless of the methodology.