Hi Megha,
Yes this query belongs to the said forum.
However you may try this.
Use Tcode CM25
Select profile: SAPCRPG004 to get this screen.
Image may be NSFW.
Clik here to view.
Give your multiple Production Orders here and execute.
The output screen is a GANTT chart.
Hope this satisfies your requirement.
Jogeswara Rao K