Sending mail with multiple accounts

Please excuse my question: it probably has an easy answer, but it's been a few years since I've played around with settings, and I can't seem to word my question correctly in search engines for an answer.

A few years back, before Google had reliable push, I set up an @me.com email account, so that I could forward all of my gmail messages to the Mail app and have it work...

It's been fairly reliable, but fast forward to today, and I've run into an issue: My employees have my email address as an @gmail.com, but when I go to respond, they're getting my @icloud.com address.... Which really confuses them.

So realizing that I'm not making it easy on them, is there any easy fix? Can we alter the settings so that my icloud accounts send my emails out as Gmail? Or would the simplest solution be to delete icloud and stick with gmail?

Any ideas?

 

We'll, I guess, technically my default IS the icloud account: since emails are being forwarded to icloud and handled by the iCloud account.

I guess what I really want to do is somehow send an email from my iCloud account, but have it register as a gmail email message?