Maybe.
If the restaurant is owned by Disney, then yes, they'll take
DDP and GCs in all cases. If it's not owned by Disney, generally, restaurants in DS that accept DDP also accept Disney Gift Cards. However, they pop in and out of acceptings DDP and Disney Gift Cards all the time. A restaurant could for a couple of months, and then suddenly decide they no longer wish to take them.
Best thing to do is to call the restaurants you're interested in and ask.