the surface observation GSI assimilates

Does GSI assimilate surface T/Q/UV observation besides the Ps observation? 

I did a data assimilation at 0600 UTC when there is no radiosonde observation. Then I checked "Jo table" in the "stdout" file, and found that there is NO temperature/moisture observation assimilated. Does it mean GSI does not assimilate surface T/Q observation, since there are surface pressure (Ps) observations assimilated which means there are available surface observations?