Gary Robertson was born on 28 July 1967 in Elgin, Moray, Scotland. He developed an interest in journalism early in life, though detailed public information about his parents is not widely available.

He began his broadcasting career while still at school, working with Moray Firth Radio. This early exposure laid the foundation for a long career in journalism spanning radio and television.

Robertson later joined BBC Scotland, where he became a prominent presenter on major programmes including Good Morning Scotland, which he hosted for many years. He also presented Politics Scotland, Newsnight Scotland, and Reporting Scotland, building a reputation for balanced political coverage.

In 2025, he became the presenter of The Sunday Show, a political programme broadcast on BBC One Scotland, BBC Scotland, and BBC Radio Scotland, replacing Martin Geissler.

He lives in Scotland and keeps his personal life relatively private, though he is known to be married and settled with his family.