I have State Farm and they are ok with my a GSD. It also helps a lot if you get your GSD obedience trained and get a CGC and TT title for him or her.
You have to think liability these days as dog bites to humans and to other dogs is common. If your GSD bites a big mouth Chihuahua or a child you will get sued. Your dog barks at night because you are out with your friends, your neighbors will complain to you, management, police and to animal control.
You will need to talk to dog trainers in your area, dog clubs, and so on to workout your GSD. A GSD is a good sized dog and working line is high energy dog that might not do well in a small apartment.
Troy vom Stabil Fels-GSD
Rhina vom Kaiserberg-BBM