See also Issue #112 …

When launching Geckos, by default, no template is loaded. You have to select a template and load it.

You can specify, in the launching URL, a template to be loaded by default. You need to add a parameter to the Geckos URL : http://gulix.github.io/geckos/?default_template=key

The key parameter is the key of the template you want to load. To retrieve this key, check the template description and find the key parameter :

"description": {
    "description": "Template for playing with colors !",
    "title":"Arabesque",
    "key": "arabesque",
    "credits": "by Nicolas Ronvel",
    "url": "https://github.com/Gulix/geckos/"
}

In this example, the key is arabesque, and the url to load this template by default is http://gulix.github.io/geckos/?default_template=arabesque