What are GAID references?

[cthoyt]

As a specific part of #2205, can someone help me understand what GAID references are?

Here's a listing of usages across ontologies indexed in the Bioregistry: https://biopragmatics.github.io/oquat/unknowns/prefix/gaid

e.g., UBERON_0001508 (arch of the aorta) references GAID:471

[dosumis]

Couldn't find via LLM. Assigning Chris & Melissa as they may know from back in the day.

[github-actions]

This issue has not seen any activity in the past 6 months; it will be closed automatically one year from now if no action is taken.

[cthoyt]

I would still like to know the answer