Looks like a High Yellow to me. As already mentioned...Giant is its own genetic and not just a classification for a big gecko. I have 130g+ geckos...but don't own a single "Giant" gecko.
Hes from a local breeders and yes i know giant is genetic. Hes from a normal het giant jungle and the father either a high yellow het giant jungle or a normal het nothing. The breeder wasnt sure which..
Giant is a Dominant morph so there is no "het Giant". Well technically there is, if it is carrying one copy of the gene. Is that what you were referring to?