You can. I have. Its great.
Some info for your journey:
- You need a Mounting Solution for the iPad - I use the Mountek nGroove, it fits in your cd slot and comes with magnets strong enough for a mini and can hold an iPad Pro with dual or triple magnets.
- Search r/jailbreak on Reddit and you will find many options for what you want to do.
You can also avoid jailbreaking your device, and just tether your iPad to your phone, and if you have a cellular iPad even use your phones data to load maps/waze/gmaps etc.
Tethering is really a must-have for me though, unless you actively pay for a data plan on the iPad. I recommend getting a tethering package from your carrier, instead of a data plan strictly for the ipad. Turn a VPN on your phone and iPad and bam... Connectivity, limited data usage (under 22GB of tethered data every month for me and i use waze/spotify/over 2 hrs every commute/everyday) and a seamless notification experience. The nice thing about tethering is that you can take phone calls / texts / facetime / and you dont have to worry about carplay locking you out of certain apps on your dash.
Good luck, and enjoy!