What does gva mean in sheet music?

In sheet music, the term "G.V.A." stands for "grace voice aside". It is typically used in choral music to indicate that a particular section or phrase should be sung softly and with a gentle, delicate tone. This can be done by singing in a lower dynamic range or by using a lighter vocal quality. The purpose of a grace voice aside is to create a sense of contrast and to add nuance to the music. It can also be used to highlight a specific part of the text or melody.