iOS 8 Google Maps SDK myLocation icon bubble graphical glitch
This is a known issue when running the Simulator. It works correctly on a real device. It's marked as WontFix on the issue tracker.
https://code.google.com/p/gmaps-api-issues/issues/detail?id=5113
Just like zhm said.It is a known problem with Xcode simulator and works fine on the real iOS device.I'm adding screenshots of the difference:
