Hi Vesna,
yes, this is possible. You need to get to get to "Family tree", "Manage Family tree", Action on the right "Export Gedcom". You get the option to export photos as well (I recommend that you do not tag any of these) . Execute it.
You receive an email with the link. Click on the link and save that file. This file you can upload to wikitree.
End of simple part.
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Important: That file contains a lot of myheritage specific information that is of NO value in wikitree. You need to get rid of this before you upload it to wikitree.
You should open the ged-file wit a good text editor. You see lines that start with _UID, RIM, UPD beside others. These tags help Myheritage to sort its internal links to sources.
If you can do some scripting and have a proper editor, you can delete every line that contains these patterns including the next lines when they start with a number higher than the one with the _UID, RIM, UPD etc. The numbering is a simple way to state that this next line belongs to the last line.
If you do not have experience in scripting, well. That's a project. I think I once asked here if an import routine for myheritage files could be programmed as this would help both the one wishing to upload the myheritage ged-file and the community as there would be less data rubbish in wikitree.
I once had a free trial version of a pretty good text editor (Ultraedit). I think I used the following crude simple script and use sequentially all the tags that I wanted to get rid of as a string.
// Get user input.
var num = UltraEdit.getValue("How many occurrences do you want to find?",1);
var str = UltraEdit.getString("What string do you want to find?",1);
UltraEdit.document[0].top();
// Do operation number of requested iterations.
var x = 0;
while (x < num) {
UltraEdit.document[0].findReplace.find(str);
UltraEdit.document[0].selectLine();
UltraEdit.document[0].delete();
}
x++;
}.
Andreas