Could not build Objective-C module 'GoogleMobileAds'

I was facing the same problem while following tutorial from Google (https://developers.google.com/admob/ios/quick-start)

I also tried @Luda solution by adding Manually and succeed. After that, I decide to try again with CocoaPods by using Bridging-Header (same way with adding Analytics Lib):

• Follow tutorial here to add Bridging Header http://www.learnswiftonline.com/getting-started/adding-swift-bridging-header/
• Add #import <GoogleMobileAds/GoogleMobileAds.h> to your Bridging Header
• Clean and Build again, it will success.

What worked for me is installing GoogleMobileAds framework manually. https://developers.google.com/mobile-ads-sdk/docs/dfp/ios/quick-start#manually_using_the_sdk_download