There's something about how in Act 3 after Gale has visited the Stormshore Tabernacle, he tells the player (if romanced);
“I would much rather gaze into your eyes than hers. Yours are capable of tenderness, and feeling. No god could ever compare.”
It's worth noting that throughout the game one of Gale's most prominent characteristics is his very expressive eyes, we see it in almost all of his scenes when he looks at the player, in particular his Act 2 and Act 3 romance scene, as well other instances throughout.
But compare that to Gale after he becomes a god, his eyes are no longer the same soulful, emotional eyes as before, but glowing with ambition even if he's trying to express his emotions. He'll never truly look at the player like he once did, even if he still loves them.