The only free Primordial extant in Creation, Gaia's body technically is Creation. As with the other Primordials, she is a creature of incalculable power, so potent that the Elemental Dragons are merely fragments of her souls, but potent gods in their own right. She is, indirectly, patroness of the Terrestrial Exalted, although this is done through the agency of the Elemental Dragons rather than herself.
Gaia is the consort of Luna and her relationship with Luna was the catalyst for her to abandon the Primordials in favor of the Gods they had created. She did so at the expense of her former lover Cytherea, and Gaia's role was never so much active assistance as active non-opposition.