I usually play 1000 pt games, but I long ago gave up buying/building things based on the army, and just go for fluff reasons. Since all my gaming buddies are in the same court, it means my "Guard Army" includes quite a bit of technically not guard stuff. But to keep things a bit more official here I'll boot up my spreadsheet and have a look.
At the moment I have 2 different guard armies I keep somewhat separate. The first, the Ignee Frateris Expeditionary Force was formerly my brothers guard army. He sold it to me when he was clearing space, but I keep it together for when he wants to have a game or something.
Its almost exactly 1000 points, and clocks in at 76 "figures". (So 1 figure could be either 1 infantry guy or 1 tank.)
After that I have the 1st Canadiana Regiment "Simcoe's Wardens", A Company. Numbering 215 figures and 2795 points. (This one has more wiggle room because it includes equipment which changes each edition, where as the first army is just units. Still changes each edition but not as much.)