Updates to the Fermi-GBM Short GRB Targeted Offline Search in Preparation for LIGO's Second Observing Run

We detail the improvements made to the targeted offline search of Fermi-GBM data for coincident signals to LIGO gravitational wave triggers. Description of the changes are included, as well as comparisons between the ranking statistics and False Alarm Rate distributions for the search during LIGO O1 and O2.