National Centers for Environmental Information / National Operational Model Archive and Distribution System Catalog https://www.ncei.noaa.gov/thredds/catalog/model-gfs-004-files/202009/20200917/catalog.html

Dataset Size Last Modified
     Folder  20200917   --
         GFS Grid 4 2020-09-17 18:00 UTC fct:006.grb2 96.44 Mbytes 2020-09-18T08:40:36.822Z
         GFS Grid 4 2020-09-17 18:00 UTC fct:003.grb2 95.67 Mbytes 2020-09-18T08:40:36.949Z
         GFS Grid 4 2020-09-17 18:00 UTC fct:000.grb2 88.77 Mbytes 2020-09-18T08:40:36.460Z
         GFS Grid 4 2020-09-17 12:00 UTC fct:006.grb2 97.11 Mbytes 2020-09-17T20:40:36.604Z
         GFS Grid 4 2020-09-17 12:00 UTC fct:003.grb2 97.49 Mbytes 2020-09-17T20:40:36.647Z
         GFS Grid 4 2020-09-17 12:00 UTC fct:000.grb2 89.64 Mbytes 2020-09-17T20:40:36.485Z
         GFS Grid 4 2020-09-17 06:00 UTC fct:006.grb2 97.15 Mbytes 2020-09-17T20:40:36.566Z
         GFS Grid 4 2020-09-17 06:00 UTC fct:003.grb2 98.67 Mbytes 2020-09-17T20:40:38.406Z
         GFS Grid 4 2020-09-17 06:00 UTC fct:000.grb2 90.39 Mbytes 2020-09-17T20:40:36.248Z
         GFS Grid 4 2020-09-17 00:00 UTC fct:006.grb2 98.95 Mbytes 2020-09-17T08:40:40.979Z
         GFS Grid 4 2020-09-17 00:00 UTC fct:003.grb2 98.96 Mbytes 2020-09-17T08:40:40.722Z
         GFS Grid 4 2020-09-17 00:00 UTC fct:000.grb2 90.50 Mbytes 2020-09-17T08:40:38.211Z

NCEI-NC THREDDS Server at NCEI see Info
Documentation