GCS HOLDINGS INC revenue for the last year amounted to 1.35 B TWD, the most of which — 570.33 M TWD — came from its highest performing source at the moment, RF Device Wafer Foundry, the year earlier bringing 619.76 M TWD. The greatest contribution to the revenue figure was made by China — last year it brought GCS HOLDINGS INC 554.02 M TWD, and the year before that — 499.79 M TWD.