The Welsh Government has been working in partnership with Neath Port Talbot County Borough Council and Powys County Council to develop proposals for the GCRE.
Mae Llywodraeth Cymru wedi bod yn gweithio mewn partneriaeth â Chyngor Bwrdeistref Sirol Castell-nedd Port Talbot a Chyngor Sir Powys i ddatblygu cynigion ar gyfer y GCRE.