No.
You need to tell us more about the "gun license" and for what area. There are many different gun licenses.
That depends on if your state requires a license or not. Most do not.
you can be 10 but you need a hunters license
It depends on where you are and what you mean by gun license. If you are in the U.S. and you mean a permit to carry a gun, check the related link for information.
That depends if your state requires a license. Most don't.
It depends on where you are and what you mean by "license." In the U.S. in most states, you have to be 21 to get a handgun carry permit. In most states, you do not need a license just to own a gun.
In Missouri a 12 year old does not need a fishing license. A person does not need a fishing license until they are older.
You need to contact your local authorities.
No there is no certain age you have to get a license
Whether or not you can have a gun license at 20 years old depends on which US state you live in and the type of gun as the laws vary somewhat.
No,But to drive car you need a license where you got license when you are eligible for it like above 18 year old for license and 10th pass etc.