I don't believe that "name your price" PL will get you anything pre-rental, including Gold recognition. With a regular reservation (non bid) through PL you should be able to insert your Gold number.
http://www.flyertalk.com/forum/hertz...-vs-hertz.html
http://www.flyertalk.com/forum/hertz...priceline.html
http://www.flyertalk.com/forum/hertz...rvation-2.html