Gerard’s sculptural reliefs for the Singapore Hilton, completed in 1969, covering 5,380 square feet. In creating these reliefs, Gerard used ancient symbolic signs, such as the tumpal motifs, highly stylized tjilih figures, wayang topeng masks, Indo-Malay high chief’s knives, Singa (lion) faces, mythical animal faces, etc. to create meaningful Malaysian shapes in a semi-abstract manner.