You won't be able to tell what strain of albino he is unless you have the parents' genetics. Honestly, I'm not sure that gecko is albino. You should get a good picture of his eyes to confirm.
To be a giant, a gecko must reach 80-100 grams by one year of age. They are 9-10 inches long.
Deffinitely not an albino. It could be het for Rainwater but it's deffinately not expressed in this picture. Also to figure out the giant part we would need to know the wieght (grams) and the length (snout to tail tip).