Gretna and Gretna Green on Wikipedia.
 

All Saints Episcopal Church on Annan Road, of 1917. NY 3181 6731. © Jim Parker (2012). Link.

The former Free Church (2022 Streetview). Pevsner dates it to 1894-5, and advises that it used to have a bellcote. NY 3216 6831.

Gretna Community Church meet at the Richard Greenhow Centre on Central Avenue. NY 3188 6718. © Jim Parker (2012). DO NOT ATTEMPT AN INTERNET SEARCH FOR THIS CHURCH WITHOUT BEING AWARE THAT THE WEBSITE FOR A SIMILARLY NAMED AMERICAN CHURCH WAS INFECTED WITH A TROJAN IN 2025.

Gretna Old Parish Church (CoS) at Gretna Green, dated by Pevsner to 1789-90, but "transformed" in 1909-10.  NY 3190 6799. © Steve Bulman. Another view, © Alan Blacklock. Link. Category B listed.

St. Andrew (CoS) on Loanwath Road. NY 3177 6697. © Jim Parker (2012). Category B listed - dates it to 1917.

The former St. Ninian (R.C.) on Victoria Avenue, now the Anvil Hall Wedding Venue. © Jim Parker (2012). Category B listed - dates it to 1917, Pevsner 1918.

One, or possibly two vanished churches used to stand near the coast, south-west of Gretna. Red Kirk used to stand at Redkirk Point - in fact, if the O.S. maps are accurate, even the land it used to stand on has gone, eroded away by the sea. According to this source, "the church fell into the sea in 1675". NY 3009 6506. Further west, O.S. maps mark Church Yard (Site of) at NY 2890 6547. It may not have had a church (source). Neither site can be seen on Streetview.