President Frank-Walter Steinmeier said German unification in 1990 would "not have been possible without the trust and friendship" of the USA and Bush, who died on Friday aged 94.
Gorbachev, 87, expressed his "deep condolences" to the family of the 41st United States president and the entire American nation. His passing came seven months after the April 17, 2018, death of his wife, Barbara, to whom he was married for 73 years.
"George H.W. Bush's life is a testament to the notion that public service is a noble, joyous calling".
"Beginning with his posting as United States Permanent Representative to the United Nations in 1971 and continuing through his appointment as the Secretary-General's Special Envoy for the South Asia Earthquake Disaster in 2005, George H.W. Bush worked productively with and through the United Nations".
The former US leader is expected to lie in state in the US Capitol and then to be buried at his presidential library in Texas, where students held a candlelight vigil early Saturday, local media reported. George Bush once said that he knew that when he died, he would see his daughter Robin again.
Hundreds of photos, documents, and artifacts give us a personal look at the man who served as our 41st president.
This lesson is a salient one at a time when relations between the USA and Russian Federation have hit their lowest point since the Cold War and Presidents Donald Trump and Vladimir Putin have called for substantial investments in new nuclear weapons, risking a return to an arms race.
"We Canadians will remember his friendship and generous spirit", Ontario Premier Doug Ford tweeted.
When Bill Clinton entered the White House, he found a letter from the man he beat: George H.W. Bush.
George Herbert Walker Bush was sworn into a world he called "rich with promise".
He flew 58 combat missions and was shot down over the Pacific by Japanese anti-aircraft fire. Our thoughts are with the Bush family.
After graduation Bush embarked on a career in the oil industry of West Texas.
With this in mind, perhaps their greatest achievement is one Palazhchenko says is widely overlooked today: the Presidential Nuclear Initiatives of 1991.
Bush and his wife, Barbara, take in the action around them at the Republican National Convention in 2008. Bush for his " outstanding political credentials, guiding America and the world towards the end of the Cold War". Bush's family grow, so does his resume - from businessman to congressman, then United Nations ambassador and director of central intelligence. Bush saying, "We waited for you".