BUR #8377 has been approved by @evazion.
create implication fate/grand_order_arcade -> fate/grand_order
create implication fate/grand_order:_first_order -> fate/grand_order
create implication fate/grand_order_the_stage -> fate/grand_order
create implication fate/grand_order:_summon_pencil_servant -> fate/grand_order
create implication fate/grand_order_waltz_in_the_moonlight/lostroom -> fate/grand_order
create implication fate/grand_order_quest -> fate/grand_order
Every one of these are F/GO derivative works, like fate/extra ccc is to fate/extra.