G-Code Syntax Question

I am changing the g-code post (driver) in my sign cutting software to
be able to do plasma cutting. They use an .INI file to define the
actions of the post.

It appears that I can use different commands for the Z motion (UP
DOWN and for the M commands to turn the unit on and off. The problem
lies in the fact that on a plasma torch the torch (M5) needs to be
turned off BEFORE the head starts to move up.

What are the syntax limitations on mixing commands on a line?

Does the following line move the Z THEN turn off the torch?

G1Z1.00F50M05

or read the speed and execute the m command first?

Is the following line valid?

M05G1Z1.00F50

I don't have an option to put in a separate line for the M05 prior to
the Up command.