SPACI score report for 3gs0 in ASTRAL 2.03:

PDB Entry: 3gs0
SPACI score: 0.44
AEROSPACI score: 0.44

Experiment type: XRAY
Resolution: 1.85
R-factor: 0.232
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: 0.723
WCK2 WHAT_CHECK Ramachandran: 1.53
WCK3 WHAT_CHECK Chi angles: -1.443
WCK4 WHAT_CHECK Backbone: 1.115

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).