On desktop, after logging in, you can access Gmail apps by clicking on the "Gmail menu" icon (nine dots) in the top right corner. This will display a list of all available apps, including Gmail, Google Drive, Google Docs, etc.
On your mobile phone or tablet you can download and install Gmail apps from the App Store, if you're frequently on the go and use your mobile phone for work, some recommended apps include:
- Google Calendar
- Google Chat
- Google Drive
- Google Docs
- Google Sheets
- Google Slides
- Google Chrome