The statement "...made through a means that provides access to the notice of proposed contract action through the GPE" means that if the contract action is posted on an agency's or program's own website—and the notice is "discoverable" by someone seeking contract opportunities (or other contract information)  using the search functions on SAM.gov—then "access" has been provided to that notice "through the GPE." The FAR wording is not entirely clear and unfortunately causes some confusion.