GFNAME system variable
Function Description:
The GFNAME system variable is used to specify the pattern of a gradient fill.
Type : Integer 
Saved in : Not saved 
Initial value : 1 
Range : 1,2,3,4,5,6,7,8,9
System Variable Value:
1 : linear
2 : cylindrical 
3 : inverted cylinder
4 : spherical
5 : hemispherical
6 : curved
7 : inverted spherical
8 : inverted hemispherical
9 : inverted curved