Well, in 'Naruto Powers of a God' fanfiction, Naruto may possess god - like powers like the ability to resurrect the dead. He could bring back all the fallen comrades from the Great Ninja Wars. Also, his sensory abilities could be so strong that he can detect any threat in the entire ninja world instantly. And his chakra levels might be infinite, enabling him to perform the most powerful jutsus continuously without getting tired.
He could have the power of instant regeneration. So, no matter how severe the injury, Naruto could heal himself in a split second. This would make him extremely difficult to defeat in combat.
One possible power for Naruto as a descendant of a god in fanfiction is the ability to communicate with all living things. This would give him an edge in gathering information and in forming alliances. He could also have a special form of chakra that is far more potent than regular chakra, enabling him to perform jutsus that are otherwise impossible.
Naruto's powers are no joke, but a primordial god would be on a whole different level. Naruto has his Nine - Tails chakra, sage mode, and all his ninja skills. However, a primordial god would likely have powers that are more fundamental to the universe. Naruto would be at a disadvantage at first. But his ability to grow and adapt in battle could make up for the power gap. He might find ways to combine his existing powers in new ways to match the god's might.
Maybe Naruto's god powers allow him to travel through different dimensions at will. He could visit the Otsutsuki home planet and learn about the true origin of chakra, and then bring that knowledge back to Konoha to revolutionize ninja training. He might also encounter other god - like beings in these dimensions and have to prove himself.
He would likely have enhanced strength. Just like how he could already overpower many foes in the Naruto series, as a god dragon slayer, his physical strength could increase exponentially. He might be able to break through the toughest of dragon scales with his bare hands.
Another possible power is the ability to control all the elements with extreme proficiency, not just the ones he already has in the original series. He could combine them in ways never seen before, creating powerful and unique jutsus that could defeat any opponent.
His powers would likely be seen as extremely strange and powerful. The people of Westeros have never seen anything like chakra or ninja techniques. They might think he's a sorcerer or a god sent to disrupt or save their world.
They might give him enhanced strength. Just like in the original concept of the Egyptian god cards having great power, in the fanfiction, Naruto could use this strength to defeat stronger opponents. For example, he could break through powerful jutsu barriers more easily.