Yes, Panasonic Eluga A3 is a metal body phone.
Panasonic Eluga A3 is available in 2 colors - Gold & Mocha Gold.
Panasonic Eluga A3 does come with Fast charger. To get the fast charging, you need to use the company provided charger.
Panasonice Eluga A3 comes with 5.2 Inch HD IPS display with 1280 x 720 resolution which produces 282 PPI resolution. It has Asahi Dragontrail Glass which provides protection against scratches etc.
Yes, Eluga A3 does have a gyroscope sensor.