Mae’r Ganolfan wedi ei rhannu’n dri phrif gam:Cam 1: Darparu seidins ar gyfer cerbydau rheilffyrdd o haf 2023 ymlaenCam 2: adeiladu dau gylch profi trydan, un cylch profi cyflymder uchel 6.9km o hyd, ac un cylch profi seilwaith 4km o hyd, yn ogystal â seilwaith gefnogi ac adeiladau o 2024 ymlaenCam 3: Ychwanegu rhagor o gyfleusterau stablu, cynnal a chadw a chomisiynu yn ogystal ag adnoddau ymchwil, gwesty, a pharc busnes yn 2025 a thu hwnt.
GCRE is split in to three core phases:Phase 1: The provision of sidings for rolling stock from the summer of 2023Phase 2: The building of two electrified test loops, one high speed test loop 6.9km long and a 4km Infrastructure test loop, together with supporting infrastructure and buildings from 2024Phase 3: The addition of expanded stabling, maintenance, and commissioning facilities along with research facilities, hotel, and business park in 2025 and ongoing.