Speaking shortly after the oath was administered on him, the nominated MP said he is still a member of the United Democratic Party despite increased tension between the party and President Adama Barrow.
Barrow last Friday fired the UDP leader Ousainou Darboe as vice president and two other ministers belonging to the party.
Tension between Barrow and his former party heightened after Ya Kumba Jaiteh, one of the five nominees to the lawmaking body was sacked about three weeks ago.
Her removal had divided the National Assembly and the legal fraternity over its constitutionality or otherwise.
The Gambia Bar Association described the president’s decision as unconstitutional and called for it to be nullified.
Ya Kumba took a motion to the Supreme Court seeking the nullification of the decision and to establish its unconstitutionality.
While that lawsuit is yet to be determined by the Supreme Court, Ms. Jaiteh’s lawyers have asked for an injunction to restrain the Clerk of the National Assembly Momodou Sisay and Speaker Mariam Jack- Denton from administering the oath on Gassama who was nominated to replace her.
However, in a ruling on Friday, the apex court refused the request for an injunction, giving the lawmaking body the nod to go-ahead with the oath on Gassama and restrained Ms. Jaiteh from interfering in the process.
The Supreme Court said its decision is premised on the presumption that all official acts are legal.
Thus it was logical to allow the president’s decision to stand temporarily.
Gassama took the oath, effectively becoming a lawmaker pending the outcome of the case before the Supreme Court determining the constitutionality of President Barrow’s decision to sack Ms. Jaiteh.
However, if the Supreme Court determines in the coming weeks that the actions of the president is illegal and thus nullify it, Gassama will vacate his seat and his predecessor will assume her role again as a lawmaker.