[header] How to get rid of geckos [title] Set out sticky traps. [step] Many pest control companies make special adhesive pads that trap larger invading species, like lizards, so you can get them out of your home without having to hunt for them. Place a few of these traps around the front and back doors, basement windows, ceiling light fixtures, and the perimeter of the garage. 
Check the traps a couple times a day to see whether they've caught anything. [substeps] Sticky traps use powerful glues that form a strong bond on contact.