We attribute the "GTD" and "Getting Things Done" trademark at the bottom of the page:
"'GTD' and 'Getting Things Done' are registered trademarks of the David Allen Corporation."
"'GTD' and 'Getting Things Done' are registered trademarks of the David Allen Corporation."
That's why, I believe, you get attributions for mere mentions of mega-corp names in some advertising copy.
In this instance I think that GTD should probably be avoided without a disclaimer as it's not a common usage that I've heard whilst "getting things done" (no capitals) is just a generic phrase used in all fields. I'd be surprised if a RTM was granted for this text, perhaps the specific form of the logo is RTM-ed?
IANA-TM-L but I worked in IP for a while.