The 26-year-old was one of three qualifiers from last year's event and wants another chance to compete for the Claret Jug.
"It helps having done it once before," he said at the Royal Johannesburg and Kensington golf club.
"There are a lot of great memories from last year and knowing what is in store for you really motivates."
But with just three places on offer again, and a field of 75 to compete against, he will need much of the same in Wednesday's second and final round.
Georgiou leads from Englishman Darren Lloyd and South Africans Justin Harding and Jake Roos who each shot 66.
Desvonde Botes, who shot 64 in the final round of the European Tour-sanctioned Tshwane Open in Pretoria on Sunday, and Eduardo de la Riva of Spain were a further stroke back.
- Sports & Recreation