Gambians appointed to the Appeals Court were Naceesay Sallah Wadda, a former Gambian justice on the panel sacked by Jammeh last year, and Omar Njie, a former vice-president of the Gambia Bar Association.
Nigerian Abubakar Datti Yahaya and Sierra Leonean justice Nicholas Colin Browne-Marke were also appointed to the Supreme Court, showing that while a "Gambianisation" of the system is under way, judges with common legal systems are not barred from serving.
Headed by the previously appointed chief justice, the Supreme Court now has quorum to hear the country's most high-profile legal decisions for the first time in several months.
It sat the same day to consider Jammeh's petition that had aimed to overturn the December election he lost to President Adama Barrow.
Jammeh attempted to name new judges to the court in January from Sierra Leone and Nigeria, but none of those nominated arrived for work at a moment of intense regional pressure on the Gambian leader from neighbouring west African states.
In a volte-face, Edward Gomez, a lawyer representing Jammeh, requested the case be thrown out of court "in the best interest of this country... to ensure peace, harmony and order."
The judges have adjourned Jammeh's case until May 24.