GR? What???
Hey, lissen up, bud. Moms say things when they're angry that they regret and don't really mean. You're 13, I don't think she can legally throw you out. I don't think the law is any different in Kent than it is here in Bristol, Maine.
I don't know what prompted your mom to say such a thing, but maybe a cooling off period for you both? Do you have a friend or relative you can stay with for a day or two? I wish I could send you air fare to come stay with me for a little vacation/cooldown.
Just remember, we're here for you. Keep us posted if you can.