Former Prime Minister Stephen Harper released a statement on Bush's passing, saying Bush was a "conservative leader and deeply devoted family man", and left behind "an incredible, enduring legacy".
"Jeb, Neil, Marvin, Doro, and I are saddened to announce that after 94 remarkable years, our dear Dad has died", George Bush Jr, who went on to serve as the 43rd U.S. president, said in a statement.
But he suffered the ignominy of being a one-term president, denied a second term over a weak economy when he lost the 1992 election to upstart Democrat Bill Clinton.
Bush, the 41st president of the United States, who lived longer than any of his predecessors and possessed one of the most impressive resumes in American political history, died peacefully at his home in Houston, according to a source close to the family. The president did not attend McCain's funeral, where Obama and George W Bush both delivered tributes. His son George Walker Bush was president from 2001 to 2009, making them only the second father and son to hold the office, after John Adams (1797-1801) and John Quincy Adams (1825-1829).
"After seventy-three years of marriage, George and Barbara Bush are together again now, two points of light that never dimmed, two points of light that ignited countless others with their example ..."
His political career saw him occupy a number of positions including congressman, Central Intelligence Agency director and Ronald Reagan's vice president for the Republican Party before becoming the first member of the Bush political family to reach the nation's top office.
In a statement issued hours after Bush's death on Friday night, the Trumps said that Bush had "inspired generations of his fellow Americans to public service".
Populist FDR Democrat Brandon Presley says Former President Bush served America "with dignity both home and overseas".
Family spokesman Jim McGrath says Bush died shortly after 10 pm Friday, about eight months after the death of his wife, Barbara Bush.
The other battles he fought as president, including a war on drugs and a crusade to make American children the best educated in the world, were not so decisively won.
He served as the 41st president of the United States between 1989 and 1993.
After Iraq invaded Kuwait in August 1990, Mr Bush quickly began building an global military coalition that included other Arab states.
-Soviet Cold War that had carried the threat of nuclear annihilation.
In February 2011, then President Barack Obama awarded Bush the highest United States civilian honor, the Medal of Freedom.
Mrs Bush died in April 2018.
Mr Gorbachev worked closely with Mr Bush to bring an end to the Cold War in the late 1980s and 1990s, and lauded the former president for his abilities as a politician as well as his personal character.
He flew 58 missions off carriers in World War Two and survived being shot down over the Pacific.