From looking at the original GWG figure it looks like it uses the updated ES slim body. They should then work with the newer ES slim body and the other variants they’ve done since. The ankle peg outer diameter of those used on the ES slim body is larger than than the older (1.0/2.0) DAM series bodies or Hot Toys and much more so than Soldier Story. The closest you’ll probably get is the DAM 3.0 body which has an ankle peg diameter somewhere between the DAM 1.0/2.0 and the ES slim.
I tested a pair of ES boots and they fit reasonably on the 3.0 DAM body, and were a bit loose on the 2.0 body DAM. The ankle pegs are fixed on the 3.0 body so that helps offset the extra weight of the molded boots as the ankle peg won’t pivot on the peg/leg side. Not perfect if you like things super tight but the best option I can think of.