The RCMP is a valuable resource for laws and tips on safe and legal firearm storage and transport. The information below is from their website and handouts

Storing firearms safely Unload and lock your firearms! Store the ammunition separately or lock it up. It can be stored in the same locked container as the firearms. Non-restricted firearms Attach a secure locking device, such as a trigger lock or cable lock (or remove the bolt) so the firearms cannot be fired; or trigger lock cable lock Lock the firearms in a cabinet, container or room that is difficult to break into. locked container locked cabinet Restricted and prohibited firearms Attach a secure locking device so the firearms cannot be fired and lock them in a cabinet, container or room that is difficult to break into; or trigger locks Lock the firearms in a vault, safe or room that was built or modified specifically to store firearms safely. For automatic firearms, also remove the bolts or bolt carriers (if removable) and lock them in a separate room that is difficult to break into. Transporting firearms safely Non-restricted firearms Non-restricted firearms must be unloaded during transportation. Restricted and prohibited firearms Unload the firearms; and Attach secure locking devices to the firearms; and Lock the firearms in a sturdy, non-transparent container; and Remove the bolts or bolt carriers from any automatic firearms (if removable). Obtain an Authorization to Transport (call 1-800-731-4000). Leaving any class of firearm in an unattended vehicle locked container Lock non-restricted firearms and locked containers carrying restricted or prohibited firearms in the trunk or in a similar lockable compartment. If the vehicle does not have a trunk or lockable compartment, put firearms and firearm containers out of sight inside the vehicle and lock the vehicle. If you are in a remote wilderness area and cannot lock your non-restricted firearms inside your vehicle, unload them and put them out of sight. Attach a secure locking device to the firearms unless they are needed for predator control. Displaying firearms safely Unload and lock your firearms! Here are the rules for displaying firearms in your home: Ammunition cannot be displayed with, or accessible to, the firearms. Non-restricted firearms firearms with secure locking devices on a rack Attach secure locking devices to the firearms; or Lock the firearms in a cabinet, container or room that is difficult to break into. Restricted and prohibited firearms Attach secure locking devices to the firearms; and Securely attach them to something that cannot be moved. For automatic firearms, also remove the bolts or bolt carriers (if removable) and lock them in a separate room that is difficult to break into. Some rules may be different for firearms displayed away from home – for example, at a gun show. Contact the RCMP Canadian Firearms Program (CFP) for more information.
Canadian Firearm Shipping guidance