GLD file extension - 3dfx Glide file
What is gld file? How to open gld files?
File type specification:
The GLD file extension is associated with the Glide 3D graphics API and set of libraries for MS-DOS and Microsoft Windows that allows programmers to create games for 3dfx compatible graphics accelerators. The .gld file stores various data used for internal purposes of the Glide.
3dfx was acquired by nVidia, which stopped the development of Glide and 3dfx graphics accelerators.