I am not at all familiar with this hotel rewards program but according to the terms on the website you are short the minimum required to convert to miles. Maybe there is an easy way to prevent them from expiring, such as earning a few point through a travel shopping portal?

"For every 1 GC Award Point that you earn, you get 1 Airline Mile. All you need to do is convert a minimum of 2,500 GC Award Points, with subsequent 500-point increments."