i remember reading on geckosunlimited that a guy had blue-footed gold dusts said thats how he new they were from hawaii. i also went to the big island of hawaii and saw one there (thats what made me want to keep one in the first place, when i saw how awesome and cute they are). now i dug up this:
"The gold dust day gecko is widely distributed. It is native to Madagascar as well as the Comoros Islands. It has been introduced onto the Hawaiian islands and onto Farquhar island in southern Seychelles. "
http://members.aol.com/paulnagl/golddust.html