Yes, Oppo R17 Pro does have the GPS support.
No. Oppo R17 Pro does not have the LED flash at the front camera. Its display works as a flash in low-light conditions.
Yes, Oppo R17 Pro does have the in-display fingerprint scanner. Besides, it also supports face-unlock.
No. Oppo R17 Pro does not support wireless charging.
As of now, Oppo has not announced any support for 5G network on Oppo R17 Pro.
Oppo R17 Pro has a lot of points going in its favour like excellent set of cameras, great display and design as well as top-notch performance. I think Oppo R17 Pro can give solid competition to OnePlus 6T going by the overall performance.