Linden never says that she or Covenant thinks of the old man as even potentially the Creator, but the Giants seem to automatically interpret the old man under discussion as if he were the Creator. So unless Linden talked about her first pre-Land experience with Pitchwife or another of the Search, or if Covenant covered that information or something, I sort of have to conclude that SRD inadvertently, perhaps, has confirmed the shared identity of the old man and the Creator through this chunk of conversation.[Linden talking here] "So why didn't I see that old man? The one who told me that 'There is also love in the world.' Why didn't he warn me?"
... [fast forward to Covenant] "Maybe he's given up. Maybe he knows there's nothing he can do."
Forget him in this ecstasy.
At once, several of the Giants protested, prompted by their instinctive passion for life. "What, abandoned his Creation? The Earth entire?"
And I must pray for the Watch to forgive me if this has already been duly noted.
But note also, I think, that in the GI there is some dismissal of the idea of entities on a higher plane of existence compacting their reality into the lesser reality of Haven Farm's world. I don't know that this is said in the GI, but I have a half-memory of something to this effect there...
For all these seeming contradictions he's lost in, no wonder SRD is a fan of saying that there's hope in contradiction?