It all depends on what you define by god, gods are only gods when people vieuw them as such.
Even an ordinary man can be a god that way
According to F/SN even fictional heroes count as long as people know about them and treat them as such.
Caster-class Servant: Lelouch Lamperouge
(kinda ripped the template from Nerroth)
Lelouch is the son of the Emperor of Britannia, Charles di Britannia, and the late Imperial Consort Marianne, making Lelouch the eleventh prince of the Britannian Imperial Family. He was seventeenth in line for the throne prior to his mother's assassination and his sister's crippling in the same incident. A ten year old Lelouch confronted the Emperor afterward and accused him of leaving his mother defenseless, even going as far as renouncing his entitlement to the throne. In response, his father banished him to Japan, where he was used as a political hostage in the Sakuradite conflict.
Name: Lelouch Lamperouge
Attribute: Chaotic Good
Noble Phantasms: EX
Magic Resistance: A
Military Tactics: EX
The ability to always "feel" the best course of combat.
Combat rarely ends in a loss but the losses are never accounted for.
Natural talent in commanding a large military force. Rank EX is said to be impossible for even a Divine.
* Magic Resistance
Cancels all Levels of magic with the exeption of Great Magic and sorceries.
* Military Tactics
Tactical capabillities exceed that of normal human beings, this makes it possible to create entire battle plans in a matter of seconds.
As a self proclaimed divine it is only possible to control with Fear and Awe. Morale is lost making it only possible to lead an army with exceptional capabilties.
~Geass: Supreme Command~
Targets: All that make eye contact.
When looking directly into the eyes a Supreme Command can be given that cannot be refused, it can also be used to alter minds but it cannot force someone to do something they cannot do.
~Mark of Kings~
The Mark of Kings can be obtained in exchange for losing the Supreme Command ability.
From that moment on the user becomes immortal, he cannot die of wounds or old age.