No. Gionee A1 Lite is not a waterproof phone. But it is made of Aluminium Alloy and hence you may get some protection against damage.
Yes, Gionee A1 Lite does have Gyroscope sensor.
Yes, Gionee A1 Lite has 2 dedicated sim card slots and 1 dedicated memory card slot. So, you can use all of them at one go.
No. Gionee A1 Lite has 2 dedicated sim card slot and 1 dedicated MicroSD Card slot.