I am unable to install apps via the Play Store on my desktop.

✅ Yes — you can install apps via Google Play Store on Genymotion Desktop.

Brief explanation:

• The Play Store and Google Play Services are not pre-installed. Use the Open GApps button on the Genymotion Desktop sidebar to automatically install the Open GApps package; the package will be downloaded and "flashed" on the virtual device, and after restarting the VM, the Google Play Store will appear in the app drawer.
• The Open GApps widget is available even in the free edition of Desktop; you don't need to buy a license just for this.
• Note on compatibility: on Intel machines (Android x86/x86_64), some apps — especially arm64 games — may not work; for better compatibility with arm64 apps, Mac M-series or ARM64 images in SaaS are better options.

Summary steps: 1. Open the device in Genymotion Desktop. 2. Click the Open GApps button on the right sidebar. 3. Accept the disclaimer and let the package be installed. 4. Restart the device when prompted. 5. The Google Play Store will be available in the app drawer.

Sources:

• I can't find Google Play Store. Where is it?
• How to play games with Genymotion Desktop

Would you like me to send a detailed step-by-step guide (with images/ click orders) to install Open GApps on your Desktop device?