Mr Gorn, who farmed at Weddell, near Holm where he was brought up, left around half of his estate to the charity which provides emotional, financial and practical support to people in farming and crofting in Scotland.
The remainder was gifted in his will to several charities involved in supporting people with cancer.
As a young man he left Orkney to work as a stockman in Perthshire for the estate of Sir Torquil Munro, where he worked with the famous Lindertis Aberdeen-Angus herd and became very well respected in his role.
It was here where he kindled an enduring love of the Aberdeen-Angus breed, and it was while he was in Perthshire that he was encouraged to save and put some money aside for the future.
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When he returned to Orkney years later in the 1970s, he was employed at Weddell, where he would later buy the farm.
He added to his farming enterprise with the purchase of some additional land over the years and continuing to run Aberdeen-Angus cows on the property.
He travelled to Australia at one point to visit Aberdeen-Angus farmers there and won a tremendous number of show cups in his own right, which he later donated to the local agricultural society.
RSABI chief executive officer Carol McLaren recently spent time in Orkney learning more about Mr Gorn's background and how he came to leave this incredible legacy to the charity from executor Steven Metcalf and other friends.
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"This legacy means a huge amount to RSABI and it was a great privilege to be able to learn more about Charlie's life and how he came to choose to support the work we do, to help people during tough times in farming and crofting, in this incredible way," said McLaren.
"It was humbling to visit the area where Charlie was born and later farmed, and to pay respects at his grave, on behalf of all the team at RSABI.
"We are extremely grateful to Charlie for recognising the value of the work we do and choosing to kindly gift a significant part of his lifetime savings to support the charity.
"We are committed to ensuring many people facing dark times receive our support, helped by the funds he has so kindly entrusted us with."
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In recent months RSABI has delivered several initiatives in Orkney.
Following two Mental Health First Aid training courses in Kirkwall, the charity was pleased to bring the Jim Smith #KeepTalking show to Orkney at the start of 2025, followed by a Planning for the Future roadshow date this spring.
This summer, RSABI is attending both Dounby and County shows and is looking forward to bringing its Health Hut to the Orkney Mart sale on August 11th.
