I am guessing their is a typo here and you mean The Grenadier Magazine?
It came out from Europa Newsletter and The Paper Soldier and started out in 1978 I think. I went on to 1981 with issue 12 when Game Designers Workshop passed it on to some privateers.
It staggered on around Issue 30-something around 1984 or maybe 85 before folding. I think somebody from Fire & Movement was supposed to be taking it forward from then on but nothing was every heard again. I have a couple of copies in the mid-teen issue range somewhere.
Nice to be able to provide some info for something I DO know something about for once

miniature historical wargaming being my first entry into the hobby. Not selling that stuff off just yet either - unlike my D&D stuff....
Hope helpful.
Nick