Apple Mail deleted all of my gmail emails.

I doubt that your emails are truly gone. Have you gone to www.google.com and signed in on your email account there? They should all be there.

If they are you could also go back to your system preferences, select "internet accounts" select the google account (on the left panel) make sure all the items are checked on the right, if they are all checked, then delete the google account on the left panel by clicking on the "-" icon on the bottom. Then click on the "+" icon on the bottom, and choose "Google" in the right panel and start adding the information.

Then go to your apple mail icon (I call it the mail stamp cause it looks like a stamp). click on "get mail" upper left under the 3 colored buttons. This should refresh your mail and bring in your gmail....

Unless you deleted them from “All Mail”, they are still on the Goolag server. They keep everything so they can sell your personal information.

As previously mentioned, log into your gmail account on the web and look in All Mail. If not, contact Goolag asking if they can recover your emails

Once done with that task I emptied my trash.

What task is/was that? Apple Mail would not delete emails - you do. So, please explain exactly what you were doing.

Have you checked the Gmail email website to see if they are there?

It depends if you have an IMAP or POP account; IMAP accounts emails remain on the server and are downloaded every time whereas POP emails are downloaded to your computer permanently and, depending on your ISP practices, deleted on the server. So, what happens depends on the type of account you have.

I second the commotion. Any email app is just a client interface that syncs with the email account you're signed into. Empty trash = delete which syncs like everything else. Stuff in Gmail trash is automatically deleted after 30 days any way.

Although POP mail services (which Gmail is not) had a setting you could use to not delete messages from the server when they are downloaded to a client app, they never had a setting to not delete from the server when something is deleted from the client.

Hope that helps and my compliments to you for letting people know about how this works. Empty trash = delete, across the board. 🖖🏻

Assuming that you are aware that we are not Apple here, but users volunteering their time, there is no need for your reaction.

The point is: on any computer when you delete or erase something, it is gone. And yes, there is a trash can in the Mail app, listed a few mailboxes down from the inbox.

Good luck.

Once done with what task?

Writing an effective Apple Support Communities question

Once you empty the Trash, it's empty. Commercial data recovery products and services exist but success is not guaranteed and I have none in particular to recommend.

Apple's Time Machine conveys the ability to restore email messages or an entire system from a backup: Back up your files with Time Machine on Mac - Apple Support

IMAP is pretty much the standard these days and it works as you describe. Deleting an email message with Mail actually tells the IMAP server to "mark it as deleted" which does not necessarily result it in becoming immediately erased and irretrievable. The message will actually become deleted according to the mail settings you provided to Google, so you will have to open a Google Mail webpage and examine what those settings are for your account. Even then Google makes it rather difficult to actually delete email messages permanently, so you might find recourse on that web page. Go there for help.

As far as the Mail app is concerned... if you should ever inadvertently delete an email message, simply selecting Undo Delete Message from Mail's Edit menu will often suffice. Or, simply open the Trash Mailbox for each account, and retrieve the deleted messages. Drag them back to your Inbox or wherever you want to keep them.

If you go a step further and really empty Mail's Trash, you will see the following:

It means what it says.