Final answer:
A perfect 5th up from G is the note D.
Step-by-step explanation:
In Western music, the distance between two notes is called an interval. A perfect 5th is an interval of 7 semitones. Starting from G, which is the 5th note of the C major scale, a perfect 5th up from G would be the note D. So, D is the note that is a perfect 5th up from G.