It really depends on your history... If you've been dependent before you may have some mild to moderate withdrawal. On a "clean slate" (ie. Never been dependent/no deep history with benzos) I wouldn't expect much more than some insomnia or possible rebound anxiety for a day or two, if that.
Gabapentin IME takes the edge off benzo withdrawal but by no means makes the process all that much easier. I was loaded up on neurontin during etizolam withdrawal and it didn't really start helping until I was over the acutes. Many people swear by it though so your gonna have to find out for yourself, it should give some degree of benefit however.