"Gabriel's Message" which can be found in the Oxford Carol book, is, apparently, a lenten processional song, and decidedly upbeat:
Gabriel's message does away
Satan's curse and Satan's sway
Out of darkness comes our day
So behold
All the gates of heaven unfold.

Wonderous Love is upbeat, and I've heard it played during lent.

My sister and I spent Christmas with a family with a new baby named Gabriel. So, we were singing "Blow Gabriel Blow" from Cole Porter's "Anything Goes". His parents wanted to know if it was a spiritual.
My church has an Easter Vigil, with a candlelight procession. I defy anyone to keep a straight face through that procession. We can't hear each other, so we never know what we're supposed to be singing, and of course keeping the candle lit in the wind is a losing battle.