GameSir GM300 Wireless Gaming Mouse Review

/ 6 months ago

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A Closer Look & Performance

The mouse looks fantastic, it’s a simple and stylish design that looks pretty sleek and clean. However, it really is hiding quite a few trick features too. The side recess cut-out reminds me of the Roccat Kone AIMO, while the smooth finish on the top reminds me of a Logitech mouse. Don’t get me wrong though, it looks unique, but being compared to names like that is no bad thing either.

There are two large side buttons down the left side. They’re easy to control and have some deep grooves on them that give them a little added grip too. Obviously, there’s a large wing panel on this side too. This shape means you can easily rest your thumb on the mouse when using a palm rest grip.


There’s actually two wing panels on this mouse by default. However, they’re magnetic, and some flatter ones are included in the box, while we’ll see in action shortly.

The mouse is ambidextrous, so down the right side, it’s identical to the right. At least, with the side panels in their default configuration it is.

The LMB and RMB are nice and large with a small angled front edge. It’s actually this angle that reminds me of the Roccat Kone gaming mouse. Some mice tend to scoop the shape here to create a finger rest. However, I like the flatter shape, as it doesn’t limit your choice of finger placement.


Despite the appearance, the mouse wheel is actually quite large. It’s just that it is heavily recessed into the mouse. It has a thick rubber grip though, and it’s actually quite wide too, making it very easy to control. Behind that, you’ve also got a DPI cycle button, although all of these can be reprogrammed in the optional software too.

On the underside, you’ll find three slipmats on the mouse its self. However, with the wider side wings on, you’ll find they have two large slipmats of their own so the mouse doesn’t get bogged down. There’s a slider near the back to remove the hidden USB dongle, a power switch in the middle to save power, and that lovely new PWM sensor. And (we’re not done), there’s two small magnetic weights of 6.5G each sitting between the side wings and the mouse.


The magnetic mounts are pretty robust, but a firm tug, and you can remove them easily enough. They’re unlikely to come off while you’re gaming though, which is obviously a good thing.

Gram one of the other magnetic panels out of the box.

Snap it in place, and you’re good to go. Now, this is great as you can have a wide mouse, a slim mouse, or a dedicated right or left handed mouse. The choice is really yours.


What’s this little lever here? Well, pull the slider on the bottom of the mouse, and it nudges this little hidden tab down.

It’s a USB dongle in a small magnetic tray! The magnet is strong too, so hold it slightly into the back of the mouse, and it rushes in and snaps back into place. A great little design to hide this out of the way.


The mouse looks great, and I love all the little hidden and modular features. But what is it like to live with? Well, pretty darn good actually. Their PWM sensor is as good as you would expect. I’ve tried to trip it up with some fast-tracking, and it’s pretty much spot on. It’s a little twitchy at max DPI, but what mouse isn’t. Then again, you can drop it down to about 100 DPI if you want to get really serious about your sniping aim.

You can tune the DPI levels in the software, but by default, you can cycle through a handful of presets that are no doubt good enough for most people. I tend to lock in at about 4000 DPI and just leave it anyway.


As you’ve likely noticed, the mouse does have some RGB lighting too. It’s not the most dynamic or advanced, but it does the trick well enough. By default, it’s on a rainbow fade, but it’s unobtrusive enough and only has two zones. You can set it to whatever you desire though; or turn it off.

Keep in mind, it’ll use slightly more battery in wireless mode with the lights on. However, I’ve been running it for a couple of days with everything on, and still not needed a recharge.


The switches on the mouse are snappy and responsive. Easily competitive with anything else on the market these days. Honestly, you really have to buy a truly crap mouse these days to find poor switches, they’re not hard to get right.

It is a mid-sized mouse, but even my long fingers fit comfortably in a palm rest grip. The side wings are great too, giving my a comfortable thumb rest that helps with comfort and control.

However, the ergonomics are perfect for a claw/hybrid grip too. You can get really nimble and fast control here. The sensor responds well at higher DPI, which is great for those fast paced twitchy FPS games.

Power getting low or don’t want to use it wireless? Just grab the included USB cable.

It comes with a USB Type-C header for the mouse, so orientation isn’t an issue here.

Plus, it looks just as good wired, as it does wireless. It never hurts to have options and it’ll recharge while you play too; win win!

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