Everyone is focusing on only one of Gorums' anathema. What about the others? No killing prisoners or those surrendering and you can not use underhanded tactics. That seems anti-evil pro-good to me. What good worshiper wouldn't be ok with that. Most evil wouldn't be too happy, especially CE.
Add in the fact his edict is win through fair combat. He might be looking for a fight but he seems a lot more pleasant about it and in 1e you weren't allowed to harm innocents at all. That's super good.
But assuming he is just combat hungry for combats sake he should be true neutral like Nethys. Who is magic for magic sake.
