Ghana defender Harrison Afful will be the second in command during the Black Stars 2018 World Cup qualifier with Uganda next month.
The Columbus Crew player will deputize Gyan following the absence of deputy captain Andre Ayew.
Coach Kwasi Appiah axed Andre Ayew from his 26-man squad for the game which is a must win for Ghana.
The Black Stars will begin preparations next week for their qualifier against Uganda in Kampala on 7 October.