GN15 1/24 scale on 00/h0 track
15" gauge is considered the minimum practical gauge for a narrow gauge railway
Models are made of this gauge using readily available commercial track. The main ones are:
00 track scales 1/24, 1/22.5 (G gauge)
N gauge track 1/43 (0 gauge scale)
Z gauge track 1/76, 1/87 00/h0 scale gauge)
Because the scale is G gauge when using 00/ho track it is sometimes call GN15
the links below are to my practical efforts for this scale