Gramps was born in the end of the 2th century. He use to be a doctor (and probably a motorbike gang-member too), who was having affairs with his patients. When Internet collapsed, satellites became defunct and every secret that was revealed in the net became known, this was found out. He lost his medical license.
He provided for his grandson Patrick Immelman, with his mom, before she died.
These days, he's a slightly senile (but still fairly sharp), aging man with a spiteful nature.