There are dozens of G-4/Trop photographs available almost everywhere, in all the books on the Bf 109 and in many dedicated sites on the net (one is
http://www.me109.info/index-1024.php ).
As for the G-5, it was a pressurized version and I don't remember seeing one with a tropical filter (unless if one counts wrongly captioned G-6/Trop photographs spread around in the past decades...).
Hope it helps.