Yes there is.
O scale meter gauge is Om and a number of European manufacturers make items in this scale/gauge combination. I forget what the gauge actually is!
for broad gauge, here in the UK some modellers have built track and stock in O scale to run on scale (Brunel's) 7.0 foot gauge track. I don't know if there is an official designation for this gauge! I don't know about other broad gauges eg 5.0 foot but I am sure someone somewhere is doing it!
HTH
Andrew