Both Bower and npm are supported with creation wizards and launch shortcuts for executing update and install commands. Grunt and gulp build systems are accessible from within the Project Explorer view and can be executed via launch shortcuts.
The MyEclipse 2017 release will be based on Neon, and should include at least this functionality. 2017 CI 1 should be available in a couple of months.
We are also working on some related features for 2016 as well. Can you tell us what Grunt/Gulp/other capabilities you are most interested in? The ability to run tasks from within the resource explorers or other?