No, this is not about companions or grogs having the Gift, but about their reactions to the Gift.
Now, we all know that mundane people generally react badly to people having the Gift - the immediate reaction being that Gifted persons feel weird, creepy, can't be trusted, etc. (ArM5 p 75-77)
This reaction holds true not only for strangers, but for covenfolks - grogs and companions - as well.
Long familiarity with particular magi will neutralize the negative reaction ("Yes, yes, Randolf the wizard looks really creepy. I know. But once you get to know him, he is actually a fairly nice chap."), but this takes time.
So, for a brand new covenant, how do magi manage to get grogs and servants for it?
And companions - why do they associate with the magi, and go on adventures with the magi, when they should have the same negative reaction to the Gift as everyone else?
For an well-established covenant this is less of a problem - grogs will either have little contact with the magi on a daily basis, or they will have grown familiar with the magi who live there. For a new covenant though, you need to recruit all those people in the first place.
Main roles for companions in the game is either to provide to specialized skills that the magi don't have and/or to interface between Gifted magi and mundanes who get scared by the Gift - but the companions in question will of course need to associate with the magi quite a bit, and how do you persuade them to do that?
This, how the grogs and (especially) the companions in a Saga can easily interact with magi despite the negative reactions of the Gift is something that seems mostly ignored in the books. The very few covenant-living mundane characters that are detailed in the Tribunal books never seem to have any problems associating with "their" magi. (Something that struck me right now is that reading the Tribunal books one almost gets the impression that Companions are specific to player covenants, since so few are even mentioned in most covenant descriptions.)
There is a suggestion in the core rulebook that many of the people who live in covenants are there only because they have nowhere else to go. That certainly works in many cases, but there are a great many fun character concepts that don't match that description.
This turned out a bit more rambling and longwinded than intended, but how do people handle the negative reactions to the Gift with regards to grogs and companions? Just ignore it, or what?