The retirement neighborhood the place 85-year-old Gloria Serge was killed by an alligator had a reptile clear-out, TMZ has realized … eliminating any extra potential threats to residents.

Judy Murray, the next-door neighbor of Gloria, tells TMZ … the Florida Fish and Wildlife Conservation Fee was in her yard Thursday, and advised her they have been eradicating all gators from the neighborhood’s lakes.

She tells us there are about 5-6 lakes on the Spanish Lakes Fairways in Fort Pierce, however is not certain what the division’s doing with all of the alligators after their removing.

Judy mentions she wasn’t afraid of the reptiles, and nonetheless is not … including they’d usually simply lay on the financial institution. She tells us what occurred with Gloria was horrible … saying she may’ve been having a “senior second,” as she usually would not stroll her canine alongside the water.

FYI — Judy says Gloria’s household took the canine with them after her passing, and it is now dwelling up north.