No. Micromax Canvas Infinity is not a waterproof mobile phone.
Yes, Micromax Canvas Infinity does have the GPS support.
No. You will get normal charger only in the box. However, you can use Sony CP-AD2 charger to charge it much faster than the original charger.
It takes about 2 Hours to fully charge this phone. However, you can use Sony CP-AD2 fast charger to charge this phone in almost half time.
Micromax Canvas Infinity is a metal body phone.