To my knowledge there is no procedure that "recommends" a gear retraction after a gear fire warning. There is language that says if the gear has to be retracted, wait 20 minutes before doing so. Supposedly hot brakes alone will not trigger a wheel well fire alarm
Mexicana lost a B727 many years ago do to a brake/wheel fire. Don't recall the details but I'm sure once could do a little research and find the accident report.