projecto completo creo, me quedo bonito :3

templates/500.qtpl

@@ -0,0 +1,25 @@
+{% code
+type Error500Page struct {
+    Message string
+    Error string
+}
+%}
+
+{% func (p *Error500Page ) Title() %}
+500
+{% endfunc %}
+
+{% func (p *Error500Page ) Stylesheets() %}
+<link rel="stylesheet" type="text/css" href="https://cdnjs.cloudflare.com/ajax/libs/skeleton/2.0.4/skeleton.min.css">
+{% endfunc %}
+
+{% func (p *Error500Page ) Scripts() %}
+{% endfunc %}
+
+{% func (p *Error500Page ) Body() %}
+<div class="container">
+    <h1>Error: 500</h1>
+    <p>{%s p.Message %}</p>
+    <p>{%s p.Error %}</p>
+</div>
+{% endfunc %}