Quote Originally Posted by DandyPandy View Post
I've heard other people say that 40k is a permissive ruleset, so unless you are explicitly told you can do it, you can't. The codex says "If a Gladius Strike Force includes two Battle Demi-Companies..." (note the capitalization). Battle Demi-company is listed as a core formation for the Gladius. It doesn't say Pinion Battle Demi-company. Therefore, those can't be used as a core formation under a Gladius Strike Force.
I agree!