Vue

Tell Vue that gk-* tags are custom elements:

import { createApp } from "vue";
import App from "./App.vue";

const app = createApp(App);
app.config.compilerOptions.isCustomElement = (tag) => tag.startsWith("gk-");
app.mount("#app");

This docs site already sets isCustomElement in VitePress config.

Demo

Vue + gk-button