Open the file and click at the top of the sheet where you want to put the Gantt chart
Click on insert Choose object
This will bring up the Object dialogue box
Click on the Create from File tab at the top
Click on Browse button to find your Gantt chart file
Choose your Gantt chart file by clicking on it… … then click on Insert
Click the Link to File box to make sure it is ticked… … then click on OK
Click on Enable Macros
Your Gantt chart will be pasted into the document…double click anywhere on it to edit it, using Excel
Your Gantt chart file is now opened in Excel…you can make any changes you wish to make
When you have finished, save the file then close Excel
Right click anywhere on your Gantt chart and then click on Update Link
Click on Enable Macros
This copy of your Gantt chart now shows the changes you have made