If you already have a bottle for the Heroic Games Launcher and GTA V is hanging on the loading screen, open the Rockstar Games Launcher from the CrossOver bottle before launching GTA V.
From the CrossOver menu, select Bottle > New Bottle.
Enter a name in the New Bottle Name field.
Select Win7 64-bit from the New Bottle Type list and click Create.
Select your new bottle in CrossOver and expand the Advanced Options menu in the right sidebar.
Click the DXVK button to enable it.
If you have not downloaded the Heroic Games Launcher (v 1.10.3 or later), you can do so here. Once installed, open the Heroic Games Launcher, and follow the prompts to link your Epic account.
In Heroic, navigate to Settings > CrossOver. Select your CrossOver installation from the CrossOver Version list and ensure the CrossOver Bottle is the Heroic bottle you created in CrossOver.
Now that Heroic is installed and linked with Epic, you can install and run titles directly from the Heroic Games Launcher. Consider yourself heroically epic!