Are these two words synonyms?
I've seen Leitung for a team-leading role (Projektleiterin), but is Geschäftsführung for executives only?
Any better examples ?
No, they are definitely not synonyms.
Leitung means leading role. This refers to people in a lead regarding to certain subjects or other people. This doesn't imply any size or number of the led.
Geschäftsführung is an executive role. These people may decide upon every management aspect.
Geschäftsführung is a clearly defined business term - according to Wikipedia it is:
[..]ein Rechtsbegriff, mit dem entweder das Organ oder die Funktion der Leitung einer Gesellschaft beschrieben wird.
(meaning that it's a function or person leading a company)
Leitung can mean something like Firmenleitung, which would be somewhat equal to Geschäftsführung, but is used for all types of leadership, e.g. Teamleiter (team leader), Abteilungsleiter (department leader).
Geschäftsführung need not be a Leitung. An example are private schools, where Schulleitung=Head Mastership and Geschäftsführung=Executive bla are split.
– Toscho
Jul 02 '14 at 20:13
I just want to throw in here, that Leitung is not only restricted to leadership.
With Leitung people also refer to lines, cords, pipes and similar.
This is of course not the meaning they'd get in your context, but that exists ;).
On a sidenote Die Leitung can also mean the leading (not role, but activity) as in:
Die Leitung übernimmt Herr X. Er ist verantwortlich.
The leading will be done by Mr. X. He is responsible.
leadership. – Toscho Jul 02 '14 at 16:09