You can not download your application form now, After filling the application form you should had to take a print out of that application form. If you do not have the print out of your application form then I would suggest you to contact to the official or writ them mail regarding this, They can provide you the solution. Further information you can check with the given below link.

https://engineering.careers360.com/articles/karnataka-pgcet-counselling

Good Luck!