I guess I was feeling a bit too euphoric on being annointed a MinGW developer, so I migrated Artem Khodush's patches to GDB for MinGW from version 5.1.1 to 5.2.1 - the result is now available for your downloading pleasure at the MinGW SourceForge repository.
In related news, if you wish to try out my port of GCJ 3.2 to Windows, you can now get your hands dirty with it.