What does it mean to collect gold in Malaysia?

A more accurate answer should be to move the deceased to another burial site.

Usually because the place where the dead are buried is no longer suitable. If the place has been requisitioned or the family members of the deceased think it is bad for their families after seeing Feng Shui through the Feng Shui master, they will take out the body of the deceased with Taoist rituals and then move it to a new place. This whole ceremony is called picking up gold. Because the whole action directly faces many taboos in life, the name is very auspicious, called "picking up gold"