Gymea Bay takes its name from the bay on the north shore of the Port Hacking (also known as the Port Hacking River). Gymea Bay is home to the heritage-listed Gymea Bay Baths, off Ellesmere Road.  Gymea Bay Swimming Club have been using the baths for over 40 years.  The Bay and Port Hacking are used extensively for watersports such as wakeboardingand water skiing.  Local amenities include a small neighbourhood shopping strip on Casurina Road and several parks and playgrounds, the most popular being Old School Park on Gymea Bay Road.

Housing ranges from affordable homes, villas & townhouses to luxury homes and waterfronts.