src/java.base/share/classes/java/time/format/DateTimeFormatterBuilder.java

*** 1,7 ****
  /*
!  * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 3849,3858 ****
--- 3849,3862 ----
                          return parseOffsetBased(context, text, position, position + 3, OffsetIdPrinterParser.INSTANCE_ID_ZERO);
                      }
                      return parseOffsetBased(context, text, position, position + 2, OffsetIdPrinterParser.INSTANCE_ID_ZERO);
                  } else if (context.charEquals(nextChar, 'G') && length >= position + 3 &&
                          context.charEquals(nextNextChar, 'M') && context.charEquals(text.charAt(position + 2), 'T')) {
+                     if (length >= position + 4 && context.charEquals(text.charAt(position + 3), '0')) {
+                         context.setParsed(ZoneId.of("GMT0"));
+                         return position + 4;
+                     }   
                      return parseOffsetBased(context, text, position, position + 3, OffsetIdPrinterParser.INSTANCE_ID_ZERO);
                  }
              }
  
              // parse