Is possible connect the gps antenna to autoradio car antenna?
... because radio uses a much lower frequency than GPS. GPS works at 1575.42MHz while FM works from 88-108MHz (AM is lower).
The best FM antennas are a big T shape, and GPS are a circular polarised type.
hope that explains it somewhat.
If you want GPS in your ride, you have to have a GPS receiver/antenna of some sort.
Does that mean you need a bulky device on the roof of your car? Not necessarily. There are other alternatives.
I haev my GPS receiver placed in the corner of the dashboar, inside the car where it's barely visible. It gets good coverage. Of course though, for the best signal, you want it on the roof where it can see a maximum amount of sky. ANY other position (including on top of the boot) does not get as much coverage. But like I said, mine works fine where it is.