"No site_path" module for DrupalGap. Now located at https://github.com/samwilson/nositepath

nositepath.js

nositepath_temp_path = 'http://example.org';
if (!Drupal.settings.site_path || Drupal.settings.site_path == '') {
  Drupal.settings.site_path = variable_get('nositepath_site_path', nositepath_temp_path);
}

/**
 * Implements hook_deviceready().
 */
function nositepath_deviceready() {
  // Add menu item.
  drupalgap.settings.menus['main_menu'].links.push(
          {
            title: 'Config',
            path: 'nositepath',
            options: {
              attributes: { 'data-icon': 'gear' }
            },
          }
  );

  // Redirect to nositepath form if no site_path has been set yet.
  if (Drupal.settings.site_path == nositepath_temp_path) {
    //drupalgap_goto("nositepath");
    var site_path = window.prompt('Drupal URL:', nositepath_temp_path);
    nositepath_reconnect(site_path);
  }

  // Prevent system_connect() by returning false.
  return false;
}

/**
 * Implements hook_menu().
 */
function nositepath_menu() {
  var items = {};
  items['nositepath'] = {
    title: 'Connect to Drupal',
    page_callback: 'drupalgap_get_form',
    page_arguments: ['nositepath_form'],
  };
  return items;
}

function nositepath_form(form, form_state) {
  try {
    form.prefix = '<h2>Connect to Drupal</h2>';
    form.elements['site_path'] = {
      type: 'textfield',
      title: 'Address of a Drupal site:',
      default_value: Drupal.settings.site_path,
      required: true,
    };
    form.elements['submit'] = {
      type: 'submit',
      value: 'Connect',
    };
    return form;
  } catch (error) {
    console.log('nositepath_offline_form - ' + error);
  }
}

function nositepath_form_submit(form, form_state) {
  try {
    nositepath_reconnect(form_state.values['site_path']);
  } catch (error) {
    console.log('nositepath_offline_form_submit - ' + error);
  }
}

function nositepath_reconnect(site_path) {
  try {
    // Set the site_path variables, and save the persistent one.
    Drupal.settings.site_path = site_path;
    drupalgap.settings.site_path = site_path;
    variable_set('nositepath_site_path', site_path);
    // Try to connect, and then bootstrap.
    system_connect({
      success: function () {
        alert('Connection successful!');
        // Re-bootstrap. Does this work?
        drupalgap_bootstrap();
        drupalgap_goto('');
      }
    });
  } catch (error) {
    console.log('nositepath_reconnect - ' + error);
  }
}