Galactus vs. Geia

Geia is no slouch. 😆 She might humiliate Galactus if she felt like it.

Doubtful.

Galactus can destroy Earth with his finger if he wanted (and if
he isn't badly written, as he often is sadly).

Destroy Earth, destroy Geia.

Or maybe you were just being sarcastic?

[I shall avoid making references to Captian Planet...D'Oh!doh]

do you have a more detailed description on gaes powers

This has a bit on her:
http://www.classicmarvel.com/cast/gaea.htm

Gaea represents the life force of a planet.

Galactus eats planets.

Galactus eats gaea? Sounds... erotic.