How to make text damage notifiers above enemy

Hi guys, I am trying to make damage notifiers above my enemy units when a player unit attacks them. An example of this would be like in WOW when you are attack an enemy it has a text amount of damage in red above the unit and then it fades away. How could I replicate this in unity C#? Ive tried attaching a Gui Text to the enemy unit, but it didnt show up. Ive creating a gui text object but the coordinates didnt align correctly, and it didnt really work as a child asset to my enemy objects.

Someone mentioned using camera.WorldToScreenPoint, but i was unsure how to use it to create text at a position. Can anyone help me?

Thanks,