You can use the Google URL scheme to navigate from location to location . The documentation is great, but you have to check if the Google Maps application exists on the user's iPhone.
OPTION 1:
Example:
If user have iOS 5 and older, use Google URL Scheme, If user have iOS 6 and google maps installed, use Google URL Scheme If user have iOS 6 and google maps not installed, use Apple maps URL scheme
Google URL Schema Documentation
Caution, when using the Google URL scheme, the application switches to the Google Maps application.
OPTION 2:
Is it possible to use the same, but with google maps
Google Maps for iOS SDK
Does it require downloading an application or something like that?
Yes, the Google Maps SDK for iOS
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