For SLE 15 SP5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Cloud:Tools/SLE_15_SP5/Cloud:Tools.repo
zypper refresh
zypper install google-cloud-sdk
For SLE 15 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Cloud:Tools/SLE_15_SP3/Cloud:Tools.repo
zypper refresh
zypper install google-cloud-sdk
For SLE 15 SP2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Cloud:Tools/SLE_15_SP2/Cloud:Tools.repo
zypper refresh
zypper install google-cloud-sdk
For SLE 12 SP5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/Cloud:Tools/SLE_12_SP5/Cloud:Tools.repo
zypper refresh
zypper install google-cloud-sdk