SPACI score report for 1gz2 in ASTRAL 2.04:

PDB Entry: 1gz2
SPACI score: 0.61
AEROSPACI score: 0.61

Experiment type: XRAY
Resolution: 1.5
R-factor: 0.2
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 1
PCK3 PROCHECK H-bonds: 2
WCK1 WHAT_CHECK Packing: -2.064
WCK2 WHAT_CHECK Ramachandran: -0.885
WCK3 WHAT_CHECK Chi angles: 0.213
WCK4 WHAT_CHECK Backbone: -0.9

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).