The functions of the governor-general include appointing ministers, judges, and ambassadors; giving royal assent to legislation passed by parliament; issuing writs for election.

In general, the governor-general observes the conventions of the Westminster system and responsible government, maintaining political neutrality, and has to always act only on the advice of the prime minister.

The governor-general also has a ceremonial role: hosting events at the official residence—Government House in the capital, Castries—and bestowing honours to individuals and groups who are contributing to Saint Lucia and to their communities.

The constitution empowers the governor-general to make or revoke appointments to government or public offices and to Commissions and Boards after receiving careful consultation or advice.

The governor-general's ceremonial duties include opening new sessions of parliament by delivering the Speech from the Throne, taking the salute during the Independence Day Parade, welcoming visiting heads of state, and receiving the credentials of foreign diplomats.

[3] The governor-general provides non-partisan leadership in the community, acting as patron of many charitable, service, sporting and cultural organisations, and attending functions throughout the country.

[1] The governor-general uses a personal flag, which features a lion passant atop a St. Edward's royal crown with "Saint Lucia" written on a scroll underneath, all on a blue background.