GoToMeeting currently has 4 partnered integrations, but in addition to those you can also integrate several other apps using Zapier.
Right now, you can integrate Slack, Salesforce, Acuity and Hipchat directly with GoToMeeting. Zapier gives you even more access to other integrations such as Microsoft Office 365, GSuite, Microsoft Teams, Mailchimp & Asana.
To use Slack with GoToMeeting your admin needs to enable the integration. Once that happens, it is as simple as typing "/g2m" or clicking on the phone icon in a Slack channel to start a meeting. Once you start the meeting, a link will be posted so that members of your team are able to join. What's great is that you are able to use GoToMeeting in the office or on the road and it is easy to go from Slack to GoToMeeting and vice versa. This same process works for most other integrations with GoToMeeting.
Overall, I like the integrations that GoToMeeting has available, I just wish that it was easier to install all of them, instead of having to go to a secondary app such as Zapier to add them.
This user rated GoToMeeting's integrations: 4.0