Gerelmaa is from the Mongolian Гэрэлмаа (Gerelmaa — gerel light + feminine ending -maa). The Mongolian -maa feminine ending derives from Tibetan-Sanskrit mā (mother) — central to Mongolian-Tibetan Vajrayana Buddhist naming tradition. Notable bearer: Gerelmaa Erdenechimeg — Mongolian-American physician.
Gerelmaa 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.
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In Pythagorean numerology the letters of Gerelmaa reduce to 8, The Visionary. This is a traditional interpretive system, not a factual claim about the name.