Open the Word document and paste the signature into your Outlook settings.
⚠ This is an unconventional installation process that is working well.
The ideal method is to host these images on your own servers. (You can see brief instructions in the attached "ServerOnly" folder).
Open the document "signature-noimg(Gmail).html".
Copy the signature you see in the browser
Open GMAIL, open a new email, clean the whole body of the message and paste the signature copied in the previous step. Send this email to yourself (This forces Gmail to host the images on its server).
Open the new email received, copy the signature you see in it.
Go to Gmail settings, and create a signature, paste the one from the previous step and save.