HunchBluntley: As far as I'm aware, China is the only Asian nation (not counting Russia) for which GOG has regional pricing and support for the local currency and payment processors.
immi101: Armikrog has regional pricing in SEA (incl South Korea, Indonesia, Phillippines, Thailand, India, Malaysia).
de Blob has regional pricing in South Korea.
Children of Zodiarcs has regional pricing in Japan.
Seems that if publisher insist on certain regional prices then GOG has no problem adding that to their system, even it is not part of their usual default pricing scheme.
Yep, I remembered, and edited my post just a few minutes after I posted that to mention that that part was not completely correct.