Hello @VineethKN ,
Please try the following:
1. Create a blank application and add a blank vertical gallery control to the page.
2. Bind the gallery to a table as following: Gallery1.Items=Table({one:"A", two:"B", three:"C", four:"D"},{one:"E", two:"F", three:"G", four:"H"})
2. Add four buttons to the gallery. Set
Button1.Text=ThisItem.one
Button2.Text=ThisItem.two
Button3.Text=ThisItem.three
Button4.Text=ThisItem.four
3. Set Button actions as following:
Button1.OnSelect=Notify(ThisItem.one)
Button2.OnSelect=Notify(ThisItem.two)
Button3.OnSelect=Notify(ThisItem.three)
Button4.OnSelect=Notify(ThisItem.four)
Try clicking on buttons now.
You can bind the gallery now to something else and your gallery items will still be clickable and referencing the proper informqation. See the screenshot below where the element "H" is clicked. Note that you can also style the button controls so they don't look like buttons (change color, borders and so on):

I hope this is what you're looking for.