We are looking to implement the Google AdWords Remarketing tag. The document from Google states the following two variables must be set.
var google_custom_params = window.google_tag_params;
var google_remarketing_only = true;
Is this required when implementing this tag through Tealium?
That code syntax mentioned in the Google document is not required when implementing the tag via Tealium.
Our template sets the default values for both those variables as required by Google. There are other custom parameters you can set via the mapping toolbox, but those specific global ones you mentioned are taken care of by the template.