https://admissions.yale.edu/single-choice-early-action says that “You may apply to any public institution at any time, provided that admission is non-binding.” Since GT has early action (not early decision) that is non-binding according to http://admission.gatech.edu/first-year/deadlines-fees , you can apply to both Yale SCEA and GT EA.
Note that GT requires EA application for consideration for merit scholarships.