Yes gun was used during Battle of Gazala, I found it listed under Rommel HQ but I suppose they were mostly north (Kusten) . Kampfgruppe Menny which had one abteilung was mobile group in Italian corp made from part of 90 leichte Division so I suppose they were closer south to the DAK and main trust.
But as Gazala map in FH2 is scaled from huge terrain and includes both Italian and German, I think its still OK to use it.
OBB Axis- Battle of Gazala Panzerarmee "Afrika" – Rommel ------523. Kusten Artillerie Abteilung (-) (see KG "Menny") – 8 x 155mm sFH414[f] How.
------528. Kusten Artillerie Abteilung – 12 x 155mm sFH414[f] How.
------529. Kusten Artillerie Abteilung – 12 x 155mm sFH414[f] How.
------532. Kusten Artillerie Abteilung – 12 x 155mm sFH414[f] How.
Corpo di Armata XXIKampfgruppe Menny
----3./523. Kusten Artillerie Abteilung - (attached) (see Arko 104.) – 4 x 155mm sFH414[f] How.
----533. Kusten Artillerie Abteilung - (attached) – 12 x 155mm sFH414[f] How.
And to conclude; I think germans used in Africa mostly GPF-T which is actually with pneumatic wheels and some more minor differnces, but I think it doesnt stop this type to be used instead. Its really same caliber and range.
Does it needs to be re-export? This guy made it half worked and said it has everything working... I dont know really
http://fhpubforum.warumdarum.de/index.php?topic=21574.0