The popular racing driver and television show presenter died after suffering from "flu-like" symptoms whilst attempting to summit Kilimanajro, the highest peak in Africa.
Mabaso was on the Trek4Mandela expedition that this year aimed to raise enough funds to ensure that 350 000 girl children would not miss a day of school due to menstrual challenges.
He said Zulu had been complaining of flu-like symptoms for the past two days.
"I would check on every member of the group and after Gugu complained again of feeling flu-ish, the team doctor examined him." The rally car driver was put on a drip and rushed to a hospital where he died.