How deep do you want to go? White Star is shallower than Gilboa, and so it is generally warmer (as the season progresses). It gets to about 46 degrees or so down at the tubes in Gilboa, even in the late summer. At the platforms and shallower section, it will be in the upper-60s to low-70s by later in the summer. Single-layer 7mm should be fine for most folks. Farmer John and jacket will be best for going down by the Christmas tree and the tubes. But if you just make a short dive down there and then come back up to the various wrecks, a single-layer would probably be okay.
Most people will wear a 7mm hood and 5mm gloves, but again it depends on your profile.
All of this is going to depend on your cold tolerance. I get cold easily, so I dive a drysuit. I know folks who will use a 5mm, no hood, no gloves for teaching, when most of the time is spent at the platforms.