I've had both local and general anaesthesia with no problems. You'll need to tell them about your medication in any case - I had to miss my morning Metformin in both cases. Don't know about the gliclizade. Just make sure they KNOW that you are Type 2 and not insulin-dependent. I've met a few nurses who think that all diabetes is insulin-dependent. Not their fault, it's the way they are trained.
With a local you won't have any problems - you'll be awake so aware of how you're feeling. Take your test kit in with you, or ask them to test you afterwards, if it makes you feel more confident. I waited about an hour after my local op. (in my back) and then drove the 30 miles home.
Just for info - After a general you shouldn't drive, and you should make sure you have someone in the house the first night, if you live alone. Just in case! But that applies to everyone after a general, not just diabetics.
Viv