As of July 2018, it seems the Goolink is no longer available on the Google Play Store.
For most customers, this should be a non-issue as we have started using FSEYE as the app of choice for our Doss NVRs.
For older models that require Goolink, please find a copy from Pure APK which hosts APK copies of apps from the Play Store.
Please note, although APKPure is a trusted, alternative source for Android apps, we cannot be held responsible for any issues that may arise from side-loading APKs on your Android device.
Users on iOS are currently not affected as the Goolink app is still live on the app store.