You can easily install or update Geta.Tags using NuGet.
Install-Package Geta.Tags
Then add UIHint("Tags") attribute to the properties where you want to use tags.
[UIHint("Tags")] public virtual string Tags { get; set; }
In edit mode this property will use Dojo MultiComboBox for selecting tags. It will provide auto suggestion of previously stored tags. New tags are stored when page is published.
Source code for Geta Tags can be found on GitHub.
Issues can be reported on GitHub.