I have a good suggestion for you. Here is what I did couple times and worked fine...take show runs from Cisco, save as text file, then build mgmt server in the lab with same version that cloud one will have. Use smart move tool to convert the Cisco config (there is video and sk about it on support site -> https://supportcenter.checkpoint.com/supportcenter/portal?eventSubmit_doGoviewsolutiondetails=&solut...)
Once that's done, you go to cloud instance and download migrate tool from settings tab and that's what you run on your lab mgmt server to then get the file you can import into cloud. I did it twice and worked without issues. Be free to message me privately if you need guidance, I will be happy to help you.
Best,
Andy
"Have a great day and if its not, change it"