For folks that have asked for automated development deployment tools in Power BI GCC, today is your day! This week the Deployment Pipelines feature was released in our government community cloud. https://docs.microsoft.com/en-us/power-bi/create-reports/deployment-pipelines-overview
This feature allows for continuous deployment into three stages (development, test and production) and allows for unique data source mapping and parameters at each stage. Be aware this is a Premium only feature and is in Preview (so the feature may change causing disruption at any given time).