piano chord
G♭5
G♭1D♭5
Root and fifth, no third at all — neither major nor minor, which is the point.
Written the other way round it is F♯5 — the same twelve keys on a piano, a different piece of notation.
What is true of it
G♭5 is G♭ and D♭ — 1 and 5 counted from G♭.