Reflected Glow
 

Does the glow effect not show up in a reflection of an object that has it applied?

No - I don't believe so since the glow is actually a post processing effect. (although I might be wrong).

Its just a post effect, its not actually part of the render, its like a photoshop plugin. Use lumionisity on the object, along with sliders to remove all other elements - or use the psd export, and comp in the reflection only of the glow, then blur the reflection in pshop?