Of course he is, how else does Gant know he dreams of unicorns?
It’s an interesting one is this, because the unicorn dream was excised in the theatrical release but restored for the Director’s Cut. In the original, Rear Admiral Adama’s origami is merely his calling card, “I was here.” In the DC it’s much more loaded, it implies that he could have retired Deckard but chose not to.
It doesn’t matter. The story works if he’s human or a replicant
See also, Total Recall. The story pans out perfectly both as presented and as if the rest of the film following the visit to Recall was the imprinted memory he bought.