What brand and model is your laptop?
Since we don't know the laptop model I have to cover a little more info here.
Most laptops have at least 1 expansion ports available on the side and you can use that to add additional ports or features if needed such as Firewire, USB2.0, or Ethernet, etc
Older laptops came with 1 or 2 full size PCMCIA ports. Those are rarely used anymore.
Newer laptops usually have an ExpressCard port.
These newer cards come with either 54 or 34 pins so you'd need to get the right one for your laptop.
For example, view the main ExpressCard info herehttp://en.wikipedia.org/wiki/ExpressCard
Be aware that Firewire is officially known as the "IEEE1394" protocol. So some sites may refer to it with that name and it's the same thing. Apple calls it Firewire and Sony calls it iLink.
There are several different pin configurations for firewire.
Original 400Mbps speed Firewire from 1995 has a mini 4 pin or a full size 6 pin cable.
Newer Firewire 800 has 800Mbps speed and is called 1394b.
That has it's own cable connector as well and is not very common. It's much faster than USB (even Firewire 400 is ) but it didn't get used a lot.
The firewire connector s are visible here:http://en.wikipedia.org/wiki/IEEE_1394_interface
The Canon GL2 uses the original 400Mbps 1394 protocol but the connector might be proprietary since it appears to have 5 pins.
It's visible here from the user manual.
There are 6-pin sockets and smaller (non-powered) 4 pin sockets and they are both still "firewire" but the small one has less options since it has no power connections with it. So the small connections can send data but can't run a portable hard drive or anything that needs power.
The small connectors are used for laptop ports and camcorders while full size desktops usually have the full size 6 pin ports. So to connect the 2 they make adapter cables with one of each type on each end.
Such as this one:http://www.amazon.com/Phoenix-IEEE-1394-4-Pin-FireWire-Meters/dp/B000165AS0
That fits most applications but I think the Canon cable is proprietary, so hopefully you have the original cable.
You probably need a laptop 1393 DV expansion card, DV editing software and the right cable. The socket on the GL2 doesn't look like a typical IEEE connector in the user manual so that may be Canon specific. If you still have the original cable that came with it then you're all set.
You can find a laptop expansion card online such as doing a search on Amazon.com with the words expresscard + 1394 and you will see many ExpressCard adapters to pick from.
Get the laptop 1394 expansion card that matches your Canon Cable and that can plug into your laptop on the other end (choose the right 54 or 34 pin type) that matches your laptop.