Build help

[solrac]

Hello, i'm new here i just wanted to know if someone can guide me to a name or to something i can go and see if i can build this little project:

I have a gps (from china) that i need to use on the car,
the problem is that i need it to turn on when the car accessory (or engine) is on, but it has a button (like a cellular) that you need to press like for half a second in order to turn it on.

I tough i could use a relay or something like that to do this but i don't know how to send that "signal" for that half second.... and then stop.
anyways it will have to do it every time the car is turned on.

Thank you.

 

[MikeMl]

Can you get inside the GPS and wire to the terminals on the back of the built-in push switch? Are you powering the GPS directly on the car's electrical system, or through a DC adapter which reduces the voltage to ~5V?