A GEDCOM file is a text file, that doesn’t include the actual photos but it may contain the links to the photos original location on your computer or family site.
Importing and exporting GEDCOM files from your family site on MyHeritage.com:
Exporting GEDCOM files from your family site on MyHeritage.com will include the links for the photos.
MyHeritage.com is able to import any GEDCOM file with links for the photos.
Importing and exporting GEDCOM files from the Family Tree Builder:
When exporting GEDCOM file from the Family Tree Builder, the program suggests you to create a sub-folder and export the photos into it.
When importing a GEDCOM from MyHeritage.com site into the Family Tree Builder, the program will recognize the links and will download the photos to your computer and into the project.