The xsmle command can perform the following spatial econometric model analysis:
i.e. SAR, SDM, SAC, SEM and GSPRE.
Spatial Autoregressive Model, SAR
Spatial Autocorrelation Model，SAC
Spatial Error Model, SEM
Spatial Durbin Model, SDM
??? , GSPRE
What is the full name of the GSPRE model? Maybe G is for generalize, S is for spatial P is for, or SP is for Semiparametric.

I have searched the network and forums but no results were found.
Can you help? It would be better if there is an introduction link or website of the GSPRE model.