As the OP asked if G2 and GP607 are combinable I feel confident that s/he should know, if s/he is entiteled to earn 2K GP bonus points two times or not. The answer to this question can be found in T&C: GP607 offer
may not be combined with other promotional offers (please re-read post # 3 and take the time to look at the link I have provided).
With reference to this line
Originally Posted by
gregorygrady
... In fact Reservations can actually add TWO (2) bonuses to each Reservations whereas we can only add one bonus to each reservation when we book online.
you advice the OP to call CS before his stay and let assume s/he will find an agent who will say s/he will fulfill this request. Most likely both bonuses in question will not find the way in his/her account. A call to CS after his/her stay should make the OP happy, but this is not guaranteed!