  We present updates to GstLAL, a matched filter gravitational-wave search
pipeline, in Advanced LIGO and Virgo's third observing run. We discuss the
incorporation of statistical data quality information into GstLAL's
multi-dimensional likelihood ratio ranking statistic and additional
improvements to search for gravitational wave candidates found in only one
detector. Statistical data quality information is provided by iDQ, a data
quality pipeline that infers the presence of short-duration transient noise in
gravitational-wave data using the interferometer's auxiliary state, which has
operated in near real-time since before LIGO's first observing run in 2015. We
look at the performance and impact on noise rejection by the inclusion of iDQ
information in GstLAL's ranking statistic, and discuss GstLAL results in the
GWTC-2 catalog, focusing on two case studies; GW190424A, a single-detector
gravitational-wave event found by GstLAL and a period of time in Livingston
impacted by a thunderstorm.
