Say what? GCN is the AMD graphics architecture that preceded RDNA and first appeared in 2012 in the Radeon HD 7000 family of GPUs. But GCN did not, in fact, die with the release of RDNA in 2019.
AMD GCN ("Graphics Core Next") architecture GPUs range through five Radeon product generations, from the Radeon HD 7000 (2012 ...
Adrenalin Edition 25.2.1 might be a beta release but it adds support for this month's biggest PC game releases for Radeon GPUs.