Made a cheat table for the GOG version of this game recently.
Guild of Dungeoneering: Cheat Engine Table [UPD: 06/24/2020] {Bulk_Bogan} Free Download
No clue if it works for the Steam version or other ones.
Includes:
1) Money hack // Money
2) Health hack for a couple of characters (each character has separate health pointer) // Health
Launch process:
1. Start Cheat Engine, “Load” and select a table
2. “Select a process to open”, select the desired process.
3. Select the desired option, put a cross.
Download Cheat Engine from our server you can here.