11 meter ground plane home brewing

[Jim5570091]

Considering building a 5/8 wave ground plane for my base. If using a gamma match to feed a ground plane antenna would the radials and verticals be electrically common?

 

[Jim5570091]

And should it be isolated from the mast?

 

[Crawdad]

I found several sources of info by Googling:
impedance matching a .625 wavelength ground plane antenna with a gamma match