Cyrtodactylus pubisulcus — Inger’s Bent-toed Gecko
Some other names for this species:
Inger’s Bow-fingered Gecko
If I had seen this gecko in Peninsular Malaysia, I would have been confident that it was Cyrtodactylus quadrivirgatus. That species is found in Borneo as well as in Peninsular Malaysia, but as far as I have been able to discover the ones that look like this on the Santubong Peninsula are C. pubisulcus.
These two have such different overall appearance that I wouldn't be surprised if they turned out to be different species, but as far as I have been able to tell they are just "dark phase" and "light phase" C. pubisulcus.