Gas

The mechanism which Ethereum has implemented for calculating the pricing and fees of smart contract operations and transactions.

Gas Limit

The highest price a user is willing to pay for a transaction’s/smart contract’s fee.

Genesis Block

The first block on a specific blockchain, otherwise known as Block 0 or 1.

Git

Git is a distributed version-control system for tracking changes in any set of files, originally designed for coordinating work among programmers cooperating on source code during software development.

GitHub

A web-based version-control and collaboration platform/repository for software developers to store the code they own or an open source one.

Gossip Protocol

A specific type of P2P communication between a computer (node) and other devices, which dictates how the information is distributed.

Gwei

A small portion of the Ether currency. Represents one-billionth of an Ether and is especially useful when using gas in Ethereum.