Fix a contact form with GSuite SMTP

I have a site that we want to send a mail from to a single email address of ours hosted within Gsuite. The From Name and the From Address need to be the ones the client inputs. The ideal freelancer will be able to sort out phpmailer and will also have experience with Gsuite and will be able to advise which relay and routing changes need to be made in order for the mail to be successfully received