Yes, Nokia 2 does have the GPS.
Yes, Nokia 2 does have the 8MP Auto Focus rear camera.
Nokia 2 has IP52 drip protection. That means it can withhold minor water pouring. But you need to be careful as the device also has the 3.5 mm jack and water can damage the phone.
Yes, you can use the Jio sim card in Nokia 2.
It's not a bad phone, this Nokia 2. It's just that there's only so much you can do within a budget this tight.