Depends on the law where you live, and whether what you were doing breaks the law. No one answer to your questions- sorry
The penalty for carrying a gun without a permit in Indiana varies depending on where it was carried and the circumstances of the arrest. In some cases this can be a level five felony and include 5-10 years in prison and large fines.
Depending on circumstances, everything from a fine to the death penalty
in MOST of the US, there is no requirement to register a gun.
If it's done legally and in the manner directed by law, there is no penalty.
Indiana does not have gun registration. If you're carrying your firearm in the legal and prescribed manner, there is no requirement for it to be registered.
packing
Depends on the law where you are, and whether it is legal to have a gun, and what you were doing with it. Without that information, we cannot even guess at an answer. Sort of like "what is penalty of having car?"
I know of no gun registeration in Maryland. No such thing as a unregistered gun.
Yes
You will have to go to court.
Every case is different. If you need information on a state or federal criminal case, seek information from your attorney or from an attorney at your local public defender's office.
That depends on what makes it illegal. Some gun offenses are misdemeanors with a maximum penalty of 1 year in jail but a more common sentence would be 12 months probation and a $500 fine. Other gun offenses are felonies that carry a 5, 10, or even 20 year prison term as the maximum punishment. Sometimes a person can break a few different gun laws all at the same time (convicted felon in possession of a stolen gun that's had the serial number filed-off and carrying it in a school zone).