Gekkos are generally non-venomous, but there are still some special circumstances that need to be paid attention to. Geckos have venomous lizards called Lepidoptera geckos, which secrete venom on their skin. However, most of the common geckos we see belong to the family Gekkoidae. They are non-venomous and often prey on insects.
As for whether cats will be poisoned if they bite geckos, generally they will not be poisoned. Common geckos have very low venom and are not a threat to most mammals. However, individual differences and allergic reactions do exist, so some cats may experience symptoms of allergic reactions or indigestion. If your cat develops abnormal symptoms after eating gecko, such as vomiting, diarrhea, loss of appetite, etc., it is recommended to consult a veterinarian for examination and treatment in time.