GWDR for new OES2018.2/SLES server migration

I found documentation for Reload 4 ( on how to migrate GW to a new server using Reload.  Is that still possible or recommended?  I have a GWDR vm running and backing up a GW 18.1.2 OES2015.1/SLES11.4 vmware vm.  The goal is to migrate GW to a new vm running OES2018.2/SLES12 with a fresh NSS volume for the GW data.  In the past I have used dbcopy and/or rsync but was curious if GWDR is useful or better in this migration scenario.