I have built a set of MTB wheels with these hubs. They are 2-cross (the 24-hole version anyway)
So I went ahead on that, and yes, the 24hole Goldix hub is indeed angled for 2-cross.
However the 28hole rear hub that I bought at same time, from same vendor, is angled for 3-cross.
So I have some Pillar 1423 bladed spokes going spare: 267mm & 264mm 16 of each.
Yours for the cost of postage - UK only
The one "upside" of this is that 3 cross on 50mm deep rear rim turns out to require same spoke lengths as the 45mm deep front rim, so not as many spares to buy.