It is possible to implement Likert scale questions in GuidedTrack with some time and effort, but we strongly advise otherwise.
Luke Freeman ran a small study to compare grid questions and GuidedTrack's auto-advancing single-select questions:
Turns out the auto-advancing ones are faster, less straight-lining, and have higher internal consistency on scales with negatively coded answers.
We have also received another researcher feedback on it:
I was concerned about the lack of grids too but used this approach [auto-advancing single-select questions] in my most recent survey and it seemed to work pretty well.
In addition, grid questions do not work very well on mobile screens.