Assuming that you’re talking about the chart, the best way to print the chart is to export to PNG or PDF and print using appropriate tools, such as MS Paint and Adobe Reader
Both PDF and PNG export allow for defining the date range of the exported chart (which is set by default to the date range which is currently shown in the chart view). They also use zooming and other setting which are active in the Gantt chart view at the moment of export.
If you export to PDF then you get the chart image on a single page. It is vector image, you can scale it to pages of different sizes.
If you export to PNG, you jsut get a raster image. You can print it on a single page or tile and print on several pages with MS Paint-like tools.