I'm sure you don't need to do any registration.
I wonder how you do not know when you follow a campaign that is clearly written in your signature.
better make it a habit to first read the details of the project you want to follow.
and your question seems to have been answered by Cappex
Initially it will be distributed as a BEP20 token on binance smart chain for the issue related to ethereum's too high fees and then move on to its mainnet.
This means that you cannot use the phore wallet to hold GFN tokens but for example metamask or a wallet that supports BSC.
The distribution will take place at the end of the 6 snapshots provided, the third will be 9th May, here the FAQ: https://getgraphene.medium.com/graphene-airdrop-faq-6feb205097a9