MoMo says:
I'm new to GP so I don't know what the standard is, but do we submit backstories, and if so, do we put them into the Notes of our Character Sheets, or PM them to the GM?
OK, so the way I treat back stories is this: I don't read them. They don't alter my enjoyment of the game one way or the other. I just don't have time to read them for every character in every game I run. I view my job as GM to help you create your ongoing story.
That said, this game is about your enjoyment so if a back story helps with that, rounding out your character a bit more then feel free to generate one. I'm just saying that I prefer to busy myself with your character's present story. Hope that makes sense.