GBC International Bank, Westminster Branch Basic Info Reviews Routing Numbers Map & Direction Name: GBC International Bank, Westminster Branch Main Office: No Service: Full Service Brick and Mortar Office Location: 9113 Bolsa Avenue Westminster, California 92683 Orange County View other branches Phone: 714-898-9292 Please enable JavaScript to view the comments powered by Disqus. Routing NumberProcess ACH TransferProcess Wire Transfer121142258YY122235902YY125108573YY321071129YN From: To: