I have been trying to figure out a non glove-compartment place to stash one, but I haven’t come up with one yet.
Car Gun Safes The Best 10 Vehicle Gun Locks
https://www.shootingandsafety.com/best-car-gun-safes-reviews/
I use the snapsafe that is picture #2. The cable makes it hard to snatch and grab.
Get a vehicle gun safe.