Trezor
Offline hardware wallet

Step 1

Use the information on the website https://trezor.io/ to purchase a wallet and start using it offline.

Step 2

After registration create an Ethereum account.

Step 3

Your wallet is ready. Click “Add Token” to start adding GMT to the list.

Step 4

Add the GMT smart contract number in the address field:
0x7Ddc52c4De30e94Be3A6A0A2b259b2850f421989

Step 5

Now this wallet displays your GMT.