I'm not sure what sort of information you want but did a quick Google search and found these websites:
http://www.geckocare.net/anatomy.php
http://www.enchantedlearning.com/subjects/reptiles/lizard/Gecko.shtml
Don't think this is a gecko but its a lizard, shows the anotomy:
http://universe-review.ca/I10-82-lizard.jpg