That happens fairly often (though they are more often outside the house, around the light at the front door and on the windows). I don't do anything. They're harmless and eat moths and mosquitos.
I love watching Gecko's. I was holidaying in Queensland with friends some years ago and we sipped wine and watched Gecko's on the walls and roof for ages. Awesome little creatures.
Since we lived on a farmhouse, I have seen them a lot as a kid. But, now they freak me out ! I do not know why but I don't think I will be able to sleep until it is there inside my house. One of the reason is that sometimes they tend to fall from ceiling and it has fallen straight on my head long time ago.
I have never seen a gecko, so I would probably scream, then laugh as I remember something somebody once told me about people pretending to be geckos, and then I would try coax it out of the house.
Gekos and skinks don't bother me at all I think their cute and they can stay in the house for as long as they want. Spiders on the other hand I hate them, and out comes the fly spray.
I'd certainly be happy. Geckos are natural bug control. House gecko are friends in your house. Sometimes I'd give them some grains of cooked rice (they seem like it). Any way, house geckos in my country don't have such ugly texture, they're quite smooth white or cream and very cute (look at my image). Just yesterday a mischievous gecko got electric shocked by playing with my computer case. He lied belly up twitching and I started to worry he wouldn't make it. I waited and in a while he flipped himself up and started to move again which made me quite happy :D
We've had lots outside our front door over many years, in the evenings, looking so like the bricks they were resting on!!! They're lovely little creatures! And while we were in Bali for a family wedding in August '17, they were inside on the ceiling & walls in the 1st place we stayed in, & all over the light fittings on our balcony, where we sat after dinner with the lights on, at the 2nd place we stayed in, this time in Ubud.