Although Mac's dialogue hints at deeper things, the material on the whole is pretty thin and depends on as much schtick by the cast as possible to get laughs
This makes it sound like you think the only thing the playwright writes is the words the actors speak. The schtick is very much part of "the material" of Gary.
I think the show can and will be produced regionally. I think the anamatronic penises will be much harder to replicate locally than tour-de-force performances. Acting doesn't begin and end in New York.