G# 6sus4 — Resonator Guitar
G# 6sus4 has no straight-bar or slant shape in open G (GBDGBD).
G# 6sus4 stacks G# – C# – D# – F, but no bar position on the Resonator Guitar's open G (GBDGBD) strings sounds that set: at every fret, and on every short slant a steel can hold, a tone the chord needs is missing or too few strings land on it.
A guitarist would reach for a fretted grip here. A squareneck has no fretting hand, so this page charts nothing rather than a shape no steel can play — the qualities this tuning does spell are on the G# chord list, marked shape by shape.