SPACI score report for 3gy8 in ASTRAL 2.07:

PDB Entry: 3gy8
SPACI score: 0.52
AEROSPACI score: 0.52

Experiment type: XRAY
Resolution: 1.75
R-factor: 0.172
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: 4.011
WCK2 WHAT_CHECK Ramachandran: -0.687
WCK3 WHAT_CHECK Chi angles: -0.163
WCK4 WHAT_CHECK Backbone: 1.573

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).