41 C.F.R. § 102-75.1015 Are there any restrictions on Federal agencies concerning property donations to public bodies?
Title 41 - Public Contracts and Property Management
Yes, Federal agencies must obtain prior concurrence of GSA before donating to public bodies— (a) Improvements on land or related personal property having a current estimated fair market value in excess of $250,000; and (b) Land, regardless of cost.
Title 41: Public Contracts and Property Management
PART 102–75—REAL PROPERTY DISPOSAL
Subpart E—Abandonment, Destruction, or Donation to Public Bodies
Restrictions
§ 102-75.1015 Are there any restrictions on Federal agencies concerning property donations to public bodies?

