Groestlcoin is a cryptocurrency based on Bitcoin which is focused on low fees and fast transactions.
How to use Groestlcoin with Trezor
Even though Groestlcoin is not integrated in Trezor Wallet, it can be used with Electrum-GRS, with the seed and private keys protected by the Trezor device. For more information, see the Electrum-GRS page. You can also see our manual for using Bitcoin with Electrum in Apps:Electrum - the setup should be very similar.
See also: Supported cryptocurrencies