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A personal computer
Yes it is.
It is not recommended or legal to be using anything handheld especially a GPS system in a car while driving. However, passengers can help by using the handheld GPS system for you instead.
A pda
ROM
it stands for global positioning satalite
yes they did the atari lynx
android
pda
Yes, there are some GPS handheld systems that run on batteries that need to be charged. This all depends on the manufacturer.
The best simple handheld gps system is Garmin. Garmin specializes in simple and easy to use gps systems for beginners.
This question, cant' be answered, due to the fact we don't know what handheld game system you have. Please, read your instruction manual for help.