The Gnosis Chain is the EVM (Ethereum Virtual Machine) chain associated with the execution layer; it uses the stablecoin xDAI to facilitate transactions and pay fees. The network itself is secured by the consensus layer, called the Gnostic Beacon Chain (GBC). The GBC uses a Proof-of-Stake system similar to that used by Cardano and Solana: users lock a certain amount of GNO to participate in the transaction validation process and thus receive additional GNO tokens as a reward for contributing to network security.