For the actual site, see Graphictoria.
The Graphictoria account uploads mostly official items, and is the first user on the site. Though it says the account ID is 0, it is actually 10370.
It can be seen as the equivalent to the ROBLOX account on ROBLOX, as both the Graphictoria account and ROBLOX account are used for identical and similar features.
It is unknown why the join date is 12/1/14, as GToria didn't exist back then. However, this could have been a database change by EnergyCell.