This is more design nerdy than actually helpful, but here it is.
It takes the selection, and duplicates the object according to the GR, which is 1.61803398874989
tell application "Adobe InDesign CS5"
duplicate selection
set horizontal scale of selection to 161.803398874989
set vertical scale of selection to 161.803398874989
end tell
I’m too lazy to do error handling or anything else of substance.