@spiceErrorCheck<EOL>def gfstol(value):
value = ctypes.c_double(value)<EOL>libspice.gfstol_c(value)<EOL>
Override the default GF convergence
value used in the high level GF routines.

Default value is 1.0e-6

http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/gfstol_c.html

:param value: Double precision value returned or to store.
:type value: float