For SLE 15 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:fmccarthy:testscc/SLE_15_SP4/home:fmccarthy:testscc.repo
zypper refresh
zypper install virtual-host-gatherer
For SLE 15 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:fmccarthy:testscc/SLE_15_SP3/home:fmccarthy:testscc.repo
zypper refresh
zypper install virtual-host-gatherer
For SLE 15 SP2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:fmccarthy:testscc/SLE_15_SP2/home:fmccarthy:testscc.repo
zypper refresh
zypper install virtual-host-gatherer