Executive coach Tom Loncar (writing in the Australian Financial Review, Apr 21 2016) reports that gravitas was found among CEOs to be the dominant "pillar" of executive presence, and that gravitas can be developed.
Leaders who demonstrate gravitas impress us in how they hold themselves, how they listen, what they say – and don't say. They show calmness rather than histrionics. In such a person's presence, we feel assured and engaged.