To ensure that you are not bombarded with 2 notifications at the same time, Gneo allows you to switch off the syncing of Reminders from Gneo to Evernote and Evernote to Gneo.
When you sync with Evernote you will see a setting in Gneo Settings called 'Sync Options for Reminders'. From here you can select whether you wish to sync Reminder alerts from Gneo to Evernote and Evernote to Gneo.
Update: 01 July 2014
This setting is not currently working - if you have the setting switched to Off the reminder times will be removed when syncing with Evernote. We will be fixing this when we make some updates to the sync in a few months time. Thanks for your patience.