Double check if you have all these frameworks on your Xcode Project
AVFoundation.framework
CoreData.framework
CoreLocation.framework
CoreText.framework
GLKit.framework
ImageIO.framework
libc++.dylib
libicucore.dylib
libz.dylib
OpenGLES.framework
QuartzCore.framework
SystemConfiguration.framework
Please visit:- https://developers.google.com/maps/documentation/ios/start#getting_the_google_maps_sdk_for_ios
to learn step by step instructions on Adding the Google Maps SDK for iOS to your project.
Most likely you forget to add ImageIO.framework