Gwei is a portmanteau (a blend of words) of giga and wei. Gwei is a denomination of the cryptocurrency ether (ETH), the digital coin used on the Ethereum network. Ethereum is indubitably one of the visionaries of modern times in terms of finance and technology, but what is less known is its identity as a reliable financial platform for users to make transactions securely.Gwei is a denomination of the cryptocurrency ether (ETH). Ethereum is a blockchain platform, like Bitcoin, where users transact to buy and sell goods and services without a middle man or interference from a third party.Gwei is a portmanteau (a blend of words) of giga and wei. It can be written as Gwei, GweiEther or simply Gwei. The G in this case stands for gigahashes per second. The exact number of units that can be referred to as Gwei depends on which platform you're using.