The GIS has various parts of the system documented as part of individual subsystems.
DKIST Drawings
DKIST Global Interlock System (GIS) Electrical Schematics
DKIST drawings cover:
GIC (Global Interlock Controller)
Facilities LIC
Instrument LIC
OSS (Optical Subsystem) LIC
...
The Ingersoll Drawings cover the sub-racks built into Coude Rotator and Telescope Mount.