Click on the Cogwheel > Settings.
Click Accounts and Import.
Click Add a mail account.
Enter your company email address and click Next.
Your Username is your full email address.
Tick the boxes as shown and click Add Account.
Enter your Name.
Untick Treat as an alias, then click Next Step.
Upon checking your SMTP server settings, click Add Account.
Check your company email for the confirmation code, click Verify.
That’s it. Your company emails will now appear in Gmail.