There is no specific mass for sacred orders or religious profession in the Graduale Simplex because this gradual was designed for use in churches that are not cathedrals (the cover says, "In usum minor ecclesiarum").

That said, the antiphons and psalms for religious profession are listed on page 385 of the Graduale Simplex.

I made a comparison between the Gradual Romanum and the Graduale Simplex for ordinations. I attach this comparison.

As far as Mass settings in the Graduale Simplex are concerned, there are no suites as such, even though there is a loose grouping labeled I, II, III, IV, and V. One has the freedom to mix and match whatever Kyrie, Gloria, Sanctus, and Agnus Dei you wish to use.

If I can help any further, please don't hesitate to contact me.

The Solesmes monks who constructed selected GS would not have bothered with this rite for the reasons given by Paul F Ford above. They would have drawn on their familiarity with the repertoire to come up with suitable items.I lack such knowledge, but I suggest looking at the Antiphonale Synopticum for references to the antiphons and their biblical sources for inspiration. Thus the Introit Protector noster is Ps 83(V):, looking for that psalm I find http://gregorianik.uni-regensburg.de/an/#id/1549 so one could suggest that as the antiphon with verses including v10 Protector noster.