I cobbled the spreadsheet together from other card spreadsheets on the Gods Unchained Discord and Blog a while ago when Divine Order came out. Gudecks is more useful for searching up cards, so I don't use the spreadsheet often. The card descriptions are manually updated when there are balance changes. There might be a way to automate the spreadsheet with the GU card api.

Spreadsheet

https://docs.google.com/spreadsheets/d/e/2PACX-1vQGk6jZqtqdNHzyOtZPTOqbPBs5p1endWr9-6mo-IjgAjSi7K9w_OMSiI1bU1QfGL5Vz7NiHSOb7Y8A/pubhtml
You can make a copy of the spreadsheet to make your own changes.

The spreadsheet has the card proto id, name, rarity, type, faction, god, mana, strength, health, description, set, and collectible. Most of the headers are self-explanatory.
Proto id is the unique identifier of the card. I don't find it useful outside of looking up card images on card.godsunchained.

Collectible and Non-collectible

Collectible means it is a card you can own. Non-collectible cards are those generated by other cards like the Walking Plant from Staff of Roots. The non-collectible cards are in a separate tab from the collectible cards. God Powers are also stored in GU as non-collectible cards.

Highlight Cards within a Filter

The spreadsheet can be useful for some cases like searching multiple keywords at a time e.g. filter the card description for frontline then ctrl+F roar to highlight all the frontline creatures with a roar.

Stat and Keyword Count

The card stats and keywords can be aggregated to see how many cards have a specific stat or keyword.

Faction Synergy

The faction synergy tab lists all the cards who have a faction/tribe in the card description e.g. The Sky Weaver says "After an Aether attacks, draw a card.". It can help to see the tribal support each god has but you're usually better off using gudecks to search.

Core Set Refresh New Cards

I also put in the new cards from the Core Set Refresh so I could see how many new cards each tribe is getting.