GPS time extraction using GPSDO module for USRP N210

Hi

I am working on TDOA geolocation setup with 5 USRP N210, and GPSDO modules, I wish to extract the GPS time vector along with captured I/Q data on 5 USRPs installed at distant locations. This GPS time vector on each USRP will give me the time-stamp information which is necessary for aligning the captured data to work out the TDOA cross-correlation.

Can anybody provide me MATLAB commands to capture the GPS time vector?

Please help.

Thanks