Requirements:
1. Open the URL 2. Enter your ETH address. 3. Copy the code that is in the field #2 ("/code ..."). 4. Press button "Join the GSC Telegram group" & join the group. 5. Send the code to this group. That's it!
Also you can share your referral link from webpage to get more coins.
Referral bonus: 20 GSC for each invited person.