Behind Gan Sacher (on the side closer to the Supreme Court) There is a small cemetery.
Buried in this cemetery is R’ Gedalia Moshe M’Zvil
There is a segula to daven there, on Monday, Thursday and the Following Monday. Say the tehillim, light a candle, give tzeddaka, and promise that if your request has come through, to publicize that one davened at the kever and was answered.
I strongly suggest, if in Yerushalayim these days, to go and daven there.
I have, on numerous occasions, been zoche to having my tfillos at the kever answered in the positive.