I am using Google Places API to pull a list of resturants, and I am displaying them on map. However, since Apple has switched there map services over from Google in iOS 6.0, I
I would try to directly contact Google, explaining the situation, and ask them for written permission to use Apple's maps. This is more a legal question than programming. One would think that Google is aware that you can no longer display their maps using Apple's API and that, even regardless of the map, they would want you to use their places, as doing so generates advertising revenue for them.