I have a Gulpfile.js in Visual Studio 2015 RC with a single default task. For some reason it is not showing up in the Task Runner Explorer.
Task Runner Explorer
I had added gulp
This is old question but same issue could be faced by VS 2017 users.
I was facing same issue in VS 2017 and mistakenly, I had added gulpfile.js in the sub folder.
Make sure gulpfile.js is in the root folder. gulpfile should be in root folder