Many family historians collect family data in Excel (or other another spreadsheet program) as research progresses. There often comes a time time when it would be useful to convert that data into a Gedcom file so that it can be imported into a Family History program without re-keying the data.
There are several approaches to this, most will involve some reformating of the layout of the Excel data first.
Here is one method using Acc2Ged. The program is well described here and can be downloaded from http://www.fhug.org.uk/wiki/lib/exe/fetch.php?media=fhugdownloads:contents:acc2ged:acc2ged.zip