GPS Command Example 10:

/gps/particle geantino
/gps/pos/type Volume
/gps/pos/shape Sphere
/gps/pos/centre 2. 2. 2. cm
/gps/pos/radius 2.5 cm
/gps/ang/type iso
/gps/ene/type Lin
/gps/ene/min 2. MeV
/gps/ene/max 10. MeV
/gps/ene/gradient 1.
/gps/ene/intercept 0.

Resulted Distribution Plots: