.. those holders of PHR during snapshots are qualified to get this GFN airdrop. for every PHR you hold i believe you can get about 1.66 GFN, just giving you one
link regarding their snapshot so you have idea how they will distribute this GFN. and if you don't participate on any of those snapshots, i don't think you can get GFN, unless, they have other promotional activities here to get their coin.
Those who participated in the airdrop by holding Phore are the ones who will get Graphene first, if you're interested in Graphene they will immediately list it on the Decentralized exchange I read it will be on Pancakeswap, go to their telegram channel for the announcement of the listing and their smart contract as well for interaction, if the roadmap is true they will compete with the top smart contract creator in the industry.