Now that your Pokémon have arrived at the GO Park Complex, you’ll need to find them and catch them again. Speak to the receptionist again and this time choose “Enter a GO Park”. You can then select the GO Park where your transferred Pokémon went. You can also rename your GO Parks frm here.
Upon entering the GO Park, look around for the Pokémon that you want to catch. They should be there somewhere–probably near the back. While in the GO Park, opening the menu will bring up different options. You can save your game, exit back to the front desk or check the current GO Park’s summary. You can also press Y to zoom in or out.
Once you’ve found the Pokémon, interact with it. The game will bring up their information, along with the option to catch the Pokémon or move it to a different GO Park. Catching a transferred Pokémon works like catching any wild Pokémon. However, your Pokémon will not run. You can also run from them and they’ll remain in the GO Park.