Email links try to open in apple mail on iPhone

Try following these steps from Apple to change the default email app for Mac.

Change the default email app

1. Open the Mail app.
2. From the menu bar, choose Mail > Settings (or Preferences).
3. Click General.
4. Choose an email app from the “Default email reader” pop-up menu.

• • If you don't see your email app in the menu, choose Select from the menu, then select your email app from the file dialog that opens.
  • If you're using webmail instead of an email app, you can choose a web browser in this step, but the browser might not open webmail automatically when you click email links. Some third-party browsers and webmail services might have their own settings to change this behavior.
  • You might be asked to add an email account before you can change the setting in Mail. If you don't want to do that, open the other email app and check its settings for a similar way to set the default email reader. 

I saw you are on an iPhone, so here are those instructions:

Change the default web browser or email app on your iPhone, iPad, or iPod touch - Apple Support

Right click an email link in Safari and see what it says is the default program to open. Try clicking "Open With" and see if you can choose Gmail. Maybe after doing it one time, it will remember for all others.