How can I open a Google Maps URL in Apple Maps?

Solution 1:

You can simply copy and paste an URL from Google Maps (either from sharing with the Google Maps app), paste it in the Apple Maps search bar and it will resolve the correct location.

Google Maps short URL (of the form goo.gl) won't work and will need expansion before proceeding.

I've created myself a Workflow (soon to be named Shortcuts in iOS 12) to expand the URL automatically. You can force-touch an URL going to Google Maps and use this Workflow with the Workflow share extension.

Solution 2:

Not sure how you can do it in iOS, I can't find the equivalent command, but you can do it on the Google Maps web site in a browser then copy/paste the info to Apple Maps…

• go to Google maps in a browser
• search your desired location
• once that's found, right click the pin & select "What's here?"
  
• The latitude/longitude will then be shown in the info bar, top left
  
  This can be copy/pasted to Apple Maps