The error message suggests that the version of composer-runtime-api installed on the system is not compatible with the version required by laravel/framework. To fix this issue, you can try updating composer to the latest version and then running the create-project command again.
To update composer, run the following command in your terminal:
composer self-update
Once composer is updated, try running the create-project command again:
composer create-project laravel/laravel laragigs
If the issue persists, you can try specifying the version of laravel/framework in the create-project command. For example:
composer create-project laravel/laravel laragigs "10.*"
This will install the latest version of laravel/framework in the 10.x branch.