Purchase a Ledger wallet from their official website https://www.ledger.com/ and then download the Ledger Live app on your computer. Please note that the version of the Ledger Live application must be at least 2.32.
Register in the app, follow the instructions in the app to do this. Click the "Add account" button.
Enter the ticker of the token in the search box of the account adding window to find the GMT Token (GMT). Then select the token network: Ethereum (ERC-20) or Binance Smart Chain (BEP-20).
Click the "Add Binance Smart Chain Account" button. Confirm the request to add an account on the Ledger device (follow the prompts in the application).
Select Binance Smart Chain 1. Click the "Add Account" button.
Go to the "Accounts" tab. Select the Binance Smart Chain 1 account and click on it.
Copy your Binance Smart Chain 1 address. Your GMT will be stored there.
Go to your personal account on the gmt.io website. Go to the "Wallet" tab and click the "Add a wallet manually" button.
Select the BEP-20 network and enter your Binance Smart Chain 1 wallet address that you copied from the Ledger app. Click "Next".
You have added your Binance Smart Chain 1 Ledger wallet address to your account.
After you purchase tokens, the Ledger Live app will display your GMT account on the BEP-20 network.