G-Coins can be used to purchase PUBG in-game cosmetics and more.

About the base game:

Jump out of the aeroplane that flies over Erangel and finds your spot to start in. It can be a big city like Pochinky or a small pair of houses near the mountains. Loot the buildings and cities to find gear, weapons like AKM or SCAR-L and ammo to defeat your opponents. The play area will be smaller from time to time, so you need to be careful about not being in that area when the map shrinks.

In PlayerUnknown's Battlegrounds, you choose the way you want to play, whether you want to be a one-man-army playing solo or with friends as a squad. PlayerUnknown's Battlegrounds

PlayerUnknown's Battlegrounds is in Early-Access so the developers are updating and changing several aspects of the game to make it more accessible to the public. It is receiving periodical updates each month to add more content, such as new weapons like the Mini14 or MK14 or places to loot in Erangel.