Hi,
this is GK Tabs module. When you go to module settings you will find 'Tabs' section. Here you can add your tab. There is two type of tabs:
- one is text and you can add your text there
- second one is a module. If you choose thys one one to set position of module which be shown in this tab. Youc choose between tab1 to tab10. So for example if you publish some module in tab2 and then go to GK Tabs and made new tab as module and set tab2 then module published in tab2 position will show in this tab.