Please mind that you can only add one offer code to your on-line reservation. As Experience Asia Pacific’s Grand Hyatt Hotels Offer may not be combined with other promotional offers its more likely hotel staff will not be able to overrule GP's system & include G2 and GP607 at the same time.

However it never hurts to call CS and ask politely for adding another offer code. I second bbbb in the outcome, but bear in mind that your are not entiteled to earn 2K two times (= G2 & GP607) for one eligible stay.