The campaign has established by family members who described Mr St George as an outstanding son, brother, uncle, friend but most of all a loving partner and father.
The blurb on the site said: "All contributions will assist in the task of bringing Beau home from France."
His mother Liz St George, who lives who lives on the Karikari Peninsula, said her son met his long-term partner, about eight years his junior, in the shearing shed.
"Herminie got a work visa in Australia, an agricultural visa, and she was rousing and he was a shearer."
The couple owned a house together in Mangonui and rented it out, planning to travel some more while their daughter was young.
The couple were due to wed on June 17 in Gouard's home town and were holidaying in France in the lead-up to the ceremony.
"They were such a lovely couple together. We were so lucky to have her in the family."
Mrs St George said all of Beau's family were to attend the wedding and were set to travel in May and early June to Europe.
Mr St George was born in the Far North and lived in Hokianga before the family moved to Aria in the King Country to follow Neil's career as a champion shearer.
He was good at and loved sport as a child, excelling at cross-country running.
The shearing lifestyle rubbed off on Beau after the family moved back up north to Mitimiti and when he completed schooling at Whangarei Boys' High School, the teenager eventually followed in his father's footsteps.
He spent time shearing in Wollongong, south of Sydney, before basing himself in South Australia.
Mrs St George said she had not been informed of details surrounding the crash and did not yet know where Beau was driving to when it happened at 6am local time in an area known as Le Bois de L'Ours.
French media reported the crash happened in an area prone to accidents.
They reported the driver of the other car, a local man, also 33, received minor injuries and was taken to Manosque Hospital.
