There is currently no way to get XML output from the Closure Linter, and I'm not sure exactly what form (schema) you'd need for your XML output. You could
file an enhancement request, but it'd be a low priority. If you wanted to modify your checked out version of the Closure Linter (even if we aren't currently accepting contributions back) you would just need to implement a custom
error handler and
use it when running gjslint. I haven't tried to work with XML in Python before, but there are probably good libraries out there that would make this pretty easy.
Thanks,
Andy