Gareth is a Dutch-Uranian immigrant and the greatest dermatologist in the world and Holland and your anus (you don't want to know how so don't ask, but like I said he's always been there...oh actually, silly me, haven't actually said that yet. Time travel with Steven Hawking is a pain in Uranus sometimes).
Gareth has always been there, he has also always been here (Note that some would compare Gareth to Bcbkye but recent ANAL(ol)aysis of an arse hair thought to belong to Gareth shows that he has a triple-helix DNA structure).
In his spare time Gareth enjoys watching things, but that's enough of what Gareth likes, that will all be explained later.
We simply don't know what Gareth looks like, as soon as you look at him he turns invisible.
..Oh and also he used to be a member of the retarden cult (see Retardation), although he isn't smart enough to be officially classed as a retard but keep quiet about it, very, because he's probably behind the curtains with Bcbkye listening with an anal probe and Sporks right now, and then, and he always will be.
So just watch it, OK...
At the age of 3 Gareth joined the retarden cult, but had one of his 12.5 arms torn off by the juice monster seconds after his initiation, he then anal probed all the members of the retarden cult present and disappeared.
Slightly later life
After his attack Gareth went a bit mental. He became Dutch and discovered The world at the age of 2003 and started sewing.
Sewing is one of many things that Gareth likes, including watching things, plotting your death, anal probing and being Dutch.