The answer is Not.
Ran this past someone else, who took a listen and pointed out that you don't actually have a C-flat in there. Thus it's not in Dorian, it's just a simple Mixolydian. Best of luck!
I looked, and yes, I did actually have C♭ hanging around…
But it wasn’t necessary.
I got rid of it, then reexamined what I had left, and lo & behold, I’m NOT in the key of G♭ but rather C#, making my G# drone (A♭ being the enharmonic), absolutely the Mixolydian mode!
Now, I have the following available to me
G# maj (I) A# min (ii) B# dim (iii°) C# maj (IV) D# min (v) E# min (vi) and F# maj (VII)
And with that, I have another section I can move into (just a simple A# min to F# maj) which almost gives it the sound of switching keys, but I’m not. It really has some power to it and the soloing opportunities are awesome (mostly because I can just fly around an A# minor pentatonic).
My next issue is the transition between the main chorus and the.. uhh.. secondary bridge chorus verse thing. Switching immediately up front works, but the switch back is a bit rough and could use a nice transition. Once I get my solo nailed down a bit more (I’m not very fast, so I have to play “good” vs “wow”) I’ll put up some more, but the energy really, really works here.
I’ll also need to figure out a few more ways to phrase the underlying rhythms to add a little variety, but I don’t think I need to put in any more chord changes outside of that transition.
This might be the first song I ever actually complete!