If your G2 males are suddenly feminine, make sure you don’t have Cross Figure 0006 Character Morph 3D Figure Assets biala (renderosity.com) installed.
Spent an hour tracking down the fact that the
cfch_0006_g2m.dsf file located in
\Data\DAZ 3D\Genesis 2\Male\Morphs\biala\CrossFigure\ is set to 100% by default and it’s a hidden morph.
So when/ if you load any G2M character, the G2F morph automatically gets applied.
(I routinely use G2 and G1 for background characters. They’re a lower poly and consume less resources and it’s quicker than decimating G3 or G8 characters and scaling down the textures.)