If they were used as single channel multibeam fixtures, then it would be no problem.
I believe you want multidimmer version, independent control of every single lamp in those.
I also believe it can be done, but not so straightfoward.
It would be tricky but still possible in grandMA 1.
It would require one 3D model for fixture casing with one of output lens + beam, and one model with lens + beam only. Or one model that would represent part of fixture casing plus output lens and beam.
Then its up to you to use stage wizard to position in rows all properly defined dimmers so they would represent those fixtures.
In grandMA 2 it would be easier. Same 3D models reqiured, but you can make proper multipart fixture that would use those models from the start, and took care of relative positions of those models.
In this case fixture made this way would be simply to use - select, patch, position, like every other fixture.