piano chord
G♭
G♭1B♭3D♭5
A major third and a perfect fifth over the root.
Written the other way round it is F♯ — the same twelve keys on a piano, a different piece of notation.
What is true of it
G♭ is G♭, B♭ and D♭ — 1, 3 and 5 counted from G♭.
On an instrument that cannot reach all 3, the 5 goes first, in that order.