We get it, you want a gun-blade job, but you need to remember that this is an MMORPG with many traditional jobs already in the lore of the series so honestly while its a fun idea its very unlikely to come out until we visit the garleans.

Bumping the thread will not make the job come any faster if Square Enix wants a gun-blade job they'll add it in a future expansion but just remember that this new type of job has a lot of competition because there are many other jobs that have a bigger fan-base than a weapon.