There are some 'younger siblings' of FS that I would consider more enticing right now for various reasons.

Could someone please advise on the tax consequences of transferring a detached single family home between siblings via a gift transfer?

It’s a probate deal with 7 siblings involved.

If the situation is as you believe it to be, then I would prepare a short one page Quit Claim Deed and ask each of your Great Aunt's siblings to sign it. 

There's three siblings, and there was some disagreement and grumbling over who gets what, and what percentage.

Thanks Shiloh, I really think it’s a family dynamic among siblings that could be holding everything up.

The siblings and her have done the following-Checked with original manufacturer of home for paperwork - Searched the home in all the places these placards could be- Contacted county register of deeds for records- Checked with local Town authorities for records- Checked with state DMVNone of these have produced a document of when it wad built or put on the property.

I own one unit in the building and my sibling owns the other.

My sister is the executor and the rest of the siblings are all named as beneficiaries.

My father worked hard all his life to give me and my siblings everything we have ever wanted and needed but at the cost of constant joint pain and other related issues.