Gaia is a sentient planet that Rick thought he impregnated.
Externally, Gaia resembles an ordinary, green and reddish planet. When the actual landscape of the planet is seen, it is very similar to the terrain of Earth, even containing the same type of foliage, biomes and atmosphere that Earth has.
Though Gaia is a planet, she somehow speaks, acts and has the personality of a standard yet emotional woman. She seems to have an emotional attachments to Rick, whereas Rick does not reciprocate the same feelings. She showcases extreme care for her children, wanting them to have a father present in their lives.
Some time before the events of Childrick of Mort, Gaia had a relationship with Rick Sanchez and a "Zeus" named Reggie. The exact nature, length and timeline of the relationship with those two is unknown, but what is certain is that Gaia had sexual relations with both of them, leaving Gaia pregnant and emotionally attached to Rick. The relationships are severed by the end of the episode.
- Gaia, in Greek mythology, is the goddess of the earth, and the mother of all life.
- Despite being a planet, Gaia is able to call Rick on his phone.