Gionee X1s has Android 7.0 Nougat and on top of it, Gionee has used Amigo 4.0 as the user interface.
No. Gionee X1s does not have the gyroscope sensor.
Yes, Gionee X1s does have the front camera selfie flash. The front camera has 16MP resolution and you can get excellent selfies even in dark conditions.
No. Gionee X1s does not have the dual camera setup.