Michael Strahan has taken to Instagram with a touching tribute to his late father, Gene.The Good Morning America star shared a snapshot showing his dad kitted out in a New York Giants cap and jersey – Michael spent his 15-year football career playing for the team – along with a heartfelt message.MORE: Good Morning America hosts' weddings: Michael Strahan, Amy Robach and moreHe wrote: "Today would have been my dad's 84th birthday.