GPS Command Example 15:

/gps/particle geantino
/gps/pos/type Surface
/gps/pos/shape Cylinder
/gps/pos/centre 2. 2. 2. cm
/gps/pos/radius 2. cm
/gps/pos/halfz 4. cm
/gps/pos/rot2 0. 1. -0.57735
/gps/ang/type iso
/gps/ene/type Brem
/gps/ene/min 1. MeV
/gps/ene/max 20. MeV
/gps/ene/temp 2e11

Resulted Distribution Plots: