Is it illegal to use your gps on your phone while driving?
I don't think so, but it may cause you to wreck if your looking at it to much.
no, if its built into your phone you can use it legally
That's a good question but I think it is because its like texting :/
no, just be careful while using it
I would assume it is. If not, If you plow into someone and rear end them at 50+ mph and maim or kill them that could certainly be classified as immoral. (There is something to be said about learning to read a map.)
That is no different than used any form of GPS. It is meant for use even while driving.