This is a new gen Panasonic flash, so it is likely that the trigger voltage is less than 6V, and all flashguns (except Minolta/Sony) use the ISO518 standard accessory shoe with the central pin trigger.
However while it might be save and it will fit you lose all the benefits of the TTL functions the flash has. You will only be able to use the flash in manual mode.
To be honest just sell the flash on ebay or gumtree and buy yourself a 430EX or a Metz 48AF1