Vlada, I'm not sure exactly how your Webinar Programs are set up, but most customers use Program Tokens extensively. The Program Tokens are separate from the GTW information, so they are populated manually. Usually customers create Tokens for title, link, description, speaker, etc. This is handy, because that same info is used in several emails and at least 1 landing page. These Program Tokens are available through the API, specifically the
getMObjects SOAP API, so you could use that to publish the info on your website.
PS. the GTW integration only syncs event number, webinar name and description. Those are
not available as tokens in Marketo, neither are they available through the Marketo API