I beg to defer, house lizards in Singapore are house lizards. Geckos are geckos. They are different. Here's a gecko smiling at you:
<img src="http://www.sammyboy.com/attachment.php?attachmentid=2412"/>
In Thailand its call tukkae because its makes a sound like "ga ga ga ga ga ga tuk-kae tuk-kae" so the name tuk-kae