1 - Download the character file named gaia_the100.chf by clicking on the download button below the picture on this site
2 - Place the file in your Star Citizen game folder: StarCitizen\LIVE\user\client\0\CustomCharacters
3 - Open the game, select the Persistent Universe, then click on Character customization.
4 - You will find a Load/Save button, click it, and look for an entry named gaia_the100.
5 - Click on the import button