@kullurumanoj
Yes, you can disable the scrollbar (or make it not visible), but if the Gallery has more items in it than it can display in the Height of the Gallery, then it will scroll.
The best you could do would be to limit the number of items in the Gallery.
You could use the FirstN function on the Items and specify how many items you would display as a "maximum" before it would scroll.
Example, if 8 items is the point at which your gallery would scroll, then set the Items property to FirstN(yourItemDataSource, 8).
Then it will have no more items and will not scroll.
I hope that helps some.