Add gc provider.

web/src/Setting.js

@@ -444,6 +444,7 @@ export function getProviderTypeOptions(category) {
       {id: 'Alipay', name: 'Alipay'},
       {id: 'WeChat Pay', name: 'WeChat Pay'},
       {id: 'PayPal', name: 'PayPal'},
+      {id: 'GC', name: 'GC'},
     ]);
   } else {
     return [];

web/src/auth/Provider.js

@@ -160,6 +160,10 @@ const otherProviderInfo = {
       logo: `${StaticBaseUrl}/img/payment_paypal.png`,
       url: "https://www.paypal.com/"
     },
+    "GC": {
+      logo: `${StaticBaseUrl}/img/payment_gc.png`,
+      url: "https://gc.org"
+    },
   },
 };