holster: no gaydar. absolutely none.
ransom: no gaydar, but he doesn't need it. he knows if people are gay bc they either come out to him or hit on him
jack: has gaydar, but doesn't engage with it. developed a "don't ask, don't tell" mentality surrounding sexuality pretty early on :/
bitty: has gaydar, but not as good as you would think
shitty: is actively against the concept of gaydar, because it promotes stereotypes and takes away from ppl's authority on how they identify and who gets to know. also ppl just come out to him all the time anyway
lardo: has gaydar. knows too much
dex: doesn't have gaydar because if he can't see the gaydar the gaydar can't see him (later develops exceptional gaydar)
nursey: thinks he has gaydar but gets it wrong most of the time
chowder: great gaydar but he keeps it to himself