ENH: GDPval as an example

[RicardoDominguez]

Initial Checks

• I have searched the existing issues and this feature has not been requested

Problem Description

The scripts used to evaluate models for GDPval-AA would be very valuable as a practical usage example of Stirrup, particularly for users who want to evaluate open models on GDPeval.

Proposed Solution

See https://artificialanalysis.ai/methodology/intelligence-benchmarking#gdpval-aa

Alternatives Considered

No response