Schools don’t look at GPA without context. They look at the transcript, too, and can see whether or not choir was used.
Some schools recalculate.
I think the only place where it’s a big issue is in automatic scholarships which have a cutoff at a certain GPA. But even some of those are softer cutoffs if you contact the uni and explain your GPA.
Other than that, IMO, the GPA differences probably aren’t all that problematic.