According to Aaron Wilson's twitter acccount (http://twitter.com/#!/RavensInsider - FOLLOW HIM!!!). He still has to pass his physical, but I'm guessing that is a pretty sure thing at this point. It appears to be a 1 year deal and he will back up Birk.
Gurode recently played for the Cowboys and appears to be a good bit of insurance for an ailing Birk. Birk is coming off a knee surgery which doesn't appear to be super serious, but at his age and that position, you can never have too much insurance.