Dan,
I assume you are planning on doing some scratch building, because no one I'm aware of has yet produced after market parts for a Square-Bridge Gleaves. The Square-Bridge isn't anything like the bridge used on Fletchers or any other ship I can think of. If you are going to scratch-built a Square-Bridge, I think that drawings are going to be necessary and I don't know of a source off the top of my head. I don't have a list handy of the units of the Square-Bridge sub-group that were at Normandy to hunt down specific ships. I'm not sure of the camo scheme used on specific ships during Normandy for this class. From about September-October 1942 until at various points in 1944 ... most ships were painted in Ms-22. In mid to late 1944 many units were painted in a Dazzle scheme.
Anyway here are a few example photos of the unique configuration details of the Square-Bridge Gleaves units. For reference: DD493-497 and DD624-628 were built by Seattle-Tacoma SB and DD618-623 and DD645-648 (the last four were built to a modified armament configuration amidships) were Federal SB built units.
The first image is of Carmick (DD-493) as completed with four 20-mm guns. Eventually three more 20-mm guns were added. Without out the elevated centerline platform for another 20-mm gun ... you can see bridge front details.
The next two images are of Thompson (DD-627) on 25 January 1944. She was a Seattle-Tacoma SB built unit. This should be the "standard" configuration for units at Normandy. Note how the amidships 20-mm guns are grouped compared to earlier Round-Bridge units. An extra pair of 20-mm guns were added there because they could not install the 20-mm guns in the bridge wings.
The fourth image is of Nelson (DD-623) in December 1945 after she had been upgraded to the Anti-Kamikaze mod in the summer of 1945. The elevated centerline platform and single 20-mm gun were removed and the two single 20-mm mounts on the 02 deck before the bridge were replaced with twin mounts. This image is useful because it is a close-up view of the Square-Bridge and besides ... I liked the Anti-Kamikaze mod.
The fifth image is of McCook (DD-496) in March 1944. This photo is about as close to the date to the Normandy invasion that I have readily available. As you can see, she is painted in Ms-22.