Personally I went to https://console.cloud.google.com since I already had some GCP projects. Then I searched for Gemini API Key. It brought me to https://console.cloud.google.com/agent-platform/studio/setti.... Then, there was a banner saying "Enable APIs to access full platform capabilities." Then, I did that, which took quite a while (minutes). Finally, I was able to see the way to create an API key.
The fact that there's two ways to get keys is also very confusing.
The fact that there's two ways to get keys is also very confusing.