Trouble with redirecting gs output in make

[TAZ Vukovic, Mirko]

I am having trouble with the following command in GNUmake 3.79.1, where I am
trying to capture the bounding box info in a file:
$(GS) -dNOPAUSE  -sDEVICE=bbox -dBATCH $(<) >& $(@)
It produces the error
Syntax error: Bad fd number

If, instead of >& I use > the command, runs fine, except that the bb
info goes out to the screen instead of the file.
$(GS) -dNOPAUSE  -sDEVICE=bbox -dBATCH $(<) > $(@)

Any ideas?

Thanks,

Mirko