You can get this EAP build through the Toolbox App, by downloading it from the website, by using a snap package (for Ubuntu), or from right inside GoLand by selecting Automatically check updates for Early Access Program in Preferences / Settings | Appearance & Behavior | System Settings | Updates.
Download GoLand 2020.1 EAP #2
Don’t forget that you can also use nightly builds based on the latest development code almost every day, which means that you don’t have to wait for the official announcements to access the EAP builds. These nightly builds are only available via the Toolbox App, ho