/usr/lib/GNUstep/GDLAdaptors-4.9/PostgreSQL.gdladaptor/Resources/Version is in libsope1 2.2.9-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 | # version file
SUBMINOR_VERSION:=54
# v4.5.41 requires libGDLAccess v4.5.50
|