Gabriella is the Italian feminine of Gabriel — from the Hebrew Gavriʾel (גַּבְרִיאֵל), meaning "God is my strength." The archangel Gabriel announces the births of John the Baptist and Jesus in the Gospels and dictates the Quran to Muhammad in Islamic tradition.
Gabriella has been continuously climbing in the U.S. since the 1990s. Today it sits in the U.S. top 200.
Gabriella does not currently appear in the US Social Security Administration's top 1,000 girls' names, so we don't publish a US rank or birth count for it. That says nothing about the name's standing elsewhere in the world — only that it sits outside the ranked US data we rely on.
In Pythagorean numerology the letters of Gabriella reduce to 4, The Builder. This is a traditional interpretive system, not a factual claim about the name.