The GeoNet is the online multiplayer service in which your avatar can join other players in completing quests, visit other players' GeoRamas, and even customize and upload their very own Georama.
To access the GeoNet, you must proceed through the single-player main questline until you reach the point when you must pursue the princess' kidnappers. At that point, the GeoNet will become unlocked at any logic stone.
Additional guild quests can be unlocked through progressing with the storyline, and by raising your guild rank. The higher your guild rank, the higher level quests are able to be unlocked.
As of June 18, 2013 this service's online features have been permanently removed.