How long does each type of STD testing results take to come in? My bf said he was negative the same day he was tested could he be lying? Gonorrhea

Most likely . If he went to high end clinic that does dna testing in office he could have gotten same day but probably not. If someone is positive the health dept is supposed to contact everyone they had sex with and get treated.
Most within 24 hrs. Most standard std testing results can be obtained within 24 hours depending on the labs availability with the exception of syphilis testing which can take up to 1 week.