You will not need to create or register for an account to use Gizmos. Gizmos will use your Canvas log-in to connect to your online lab assignments. To connect your Canvas account to Gizmos, open the assignment labeled Gizmos Login from the Start Here: Course Resources module on the course modules page.
...
Once you see the page similar to the one below, you should be signed in. It will say "Your teacher has not yet added Gizmos to this class." That is fine - You just need to make sure your name is shown in the upper right corner indicating you are logged in. 
Now that you are signed in, you can access the various Gizmos activities. These assignments are normally titled something like "Gizmos: Name of Assignment" in your Canvas course. 
Access the lab by clicking the virtual lab links embedded in the Gizmos assignments in Canvas. For example, clicking the Gravity Pitch link in the screenshot below would open the Gizmos lab. 
Be sure to visit the Common Issues - Gizmos page if you run into any problems.
Be sure to visit the Gizmos Assignments Per Course if you need a list of your Gizmos activities.
In the “Start Here: Course Resources” Module of your course, you have a link titled “Gizmos Login”. The Gizmos links on your page should link you to this button, or you can click it directly.
...
The next page will ask you to load Gizmos in a new window. Click the Load Gizmos Login in a new window button.
...
You will be asked to connect to your Gizmos account and enter your teachers code. Skip this step by selecting “I am new to ExploreLearning.”
...
If you are enrolled in multiple courses using Gizmos then you will need to also select the class you are working in.
Use the search feature by clicking the Find Gizmos link at the top of the page then typing the name of the Gizmos lab simulation that matches your Canvas activity.
Be sure to visit the Common Issues - Gizmos page if you run into any problems.
Be sure to visit the Gizmos Assignments Per Course if you need a list of your Gizmos activities.