Tab Shortcode is not support in Shortcode Generator. Here are sample of how to use it to display tabs content on your page/post.
Horizontal Tab
[tg_tab tab1="Tab 1" tab2="Tab 2" tab3="Tab 3"] [tab id="1"]Your Content...[/tab] [tab id="2"]Your Content...[/tab] [tab id="3"]Your Content...[/tab] [/tg_tab]
Vertical Left Tab
[tg_ver_tab tab1="Tab 1" tab2="Tab 2" tab3="Tab 3"] [tab id="1"]Your Content...[/tab] [tab id="2"]Your Content...[/tab] [tab id="3"]Your Content...[/tab] [/tg_tab]
Vertical Right Tab
[tg_ver_tab align="right" tab1="Tab 1" tab2="Tab 2" tab3="Tab 3"] [tab id="1"]Your Content...[/tab] [tab id="2"]Your Content...[/tab] [tab id="3"]Your Content...[/tab] [/tg_tab]