Rotating a Gizmo along the x-axis in Editor

I have two gizmos that I'm trying to rotate on the x-axis by 90 degrees. In my game, they're part of the player, so it's constantly moving. Although, when I change the x-axis to 90, it doesn't actually rotate the real object, but it moves it.

So, how can I rotate the actual object in the editor? Do I need to add a script? Is there something I'm missing? Please tell me how I can fix this!!!